{"title":"Turbo 04-07 STI","description":"","products":[{"product_id":"iag-universal-wastegate-bracket-for-vf-td04-5-dom-series-turbos-04-21-sti-09-14-wrx","title":"IAG Universal Wastegate Bracket For VF, TD04\/5, DOM Series Turbos 04-21 STI, 09-14 WRX","description":"\u003cdiv class=\"toggle-title\"\u003e\u003ca class=\"toggleLink is-open\" href=\"https:\/\/www.iagperformance.com\/iag-universal-wastegate-bracket-for-vf-td04-5-dom-series-turbos-04-20-sti-09-14-wrx\/?gad_source=1\u0026amp;gad_campaignid=23569995977\u0026amp;gbraid=0AAAAABoGG0SGrmllEmDVXdPtOCP6CZv3B\u0026amp;gclid=CjwKCAjw1N7NBhAoEiwAcPchp0Bmsg7ekbGxYnVcVClnLraK2aXxDone-MtkXG5PRvHGRskF0OBkqRoC6L4QAvD_BwE#tabDescription-content\"\u003e\u003cspan class=\"page-heading\"\u003eDescription\u003c\/span\u003e\u003csvg class=\"icon\"\u003e\u003cuse\u003e\u003c\/use\u003e\u003c\/svg\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"toggle-content is-open\" id=\"tabDescription-content\"\u003e\n\u003cp\u003eThe IAG Performance internal wastegate locking bracket is designed to replace the wastegate actuator and lock the wastegate shut. This is the most versatile method of keeping your wastegate closed when switching to an external wastegate. The CNC machined bracket allows rotation along the compressor housing. This allows fitment across different VF, TD04\/5 and DOM series turbos if you should upgrade in the future. The dual spherical bearing linkage makes installation a snap and can be easily reverted to a stock set-up. The center turnbuckle allows you to easily close the wastegate. Turning one direction lengthens the linkage. Turning the other way shortens it.\u003cbr\u003e\u003cbr\u003eThe wastegate bracket is engineered and manufactured at our facility in Westminster, MD. The bracket is machined from a solid piece of 6061 billet aluminum and then anodized black. The linkage is made entirely of steel components and is zinc coated for corrosion protection. Comes with all hardware for an easy installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"IAG Performance","offers":[{"title":"Default Title","offer_id":52319199723842,"sku":"IAG-EXT-4020","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/IAGwastegatebkt1.jpg?v=1773682625"},{"product_id":"tr-gtx2971-ball-bearing-twin-scroll-turbo-kit-stock-replacement-for-subaru-02-07-wrx-04-18-sti","title":"TR GTX2971 Ball-Bearing Twin Scroll Turbo Kit Stock Replacement for Subaru 02-07 WRX \u0026 04-18 STI","description":"\u003cp\u003eNow available for the brand new GTX2971 Twin Scroll Turbo, the TR Equal Length Exhaust Manifold with Up-Pipe and TR Twin Scroll High Flow Catless Downpipe! The perfect combination for a complete twin scroll turbocharged setup for your WRX or STi. Rated up to ~430whp, the twin scroll technology ensures spool speed that is night and day in comparison to single scroll turbos. Thought your turbo spooled fast before? Think again.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis twin scroll edition features a ball-bearing cartridge, billet compressor wheel , and 10\u003c\/span\u003e\u003cspan\u003ecm\u003c\/span\u003e\u003csup\u003e2\u003c\/sup\u003e\u003cspan\u003e housing. Thanks to the billet compressor wheel the overall weight of the wheel is lighter than competing turbochargers and allows for maximum airflow throughout the unit with the help of point milling on each blade. A unique wheel and blade design, featuring a 20% larger wheel with 17% longer blades than the factory turbocharger. In addition, the GTX2971 features a port and polished exhaust housing to minimize exhaust flow turbulence. All hardware is included with purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCatered to the die-hard Subaru fans! The twin scroll turbo is an efficient way to replace or upgrade your current twin scroll set up on your Subaru. With the rarity of twin-scroll turbo applications, we have created yet another direct bolt-on system, this time for the 2002-2007 WRX and 2004-2018 STi. The GTX2971 is already an efficient turbo but now paired with a complete twin-scroll system, spool time is dramatically decreased!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Twin Scroll High Flow Catless Downpipe features larger diameter piping with ported flanges for a quicker and faster exhaust air flow compared to the standard OEM downpipe. Each downpipe is constructed of SUS304 grade stainless steel that gives it shine and durability that will last for years to come. Installation is a snap! The downpipe will fit like your OEM downpipe and comes with all the necessary hardware and gaskets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Twin Scroll Equal Length Headers feature a lost wax finish with 3-1 connectors and a smooth inner surface for the best air flow. A stable \u0026amp; effective connection s made by the slip joint bracket and air leakage is avoided by the 3 bolt flange design up-pipe.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAll in all the entire system will bolt together without any issues and make way for quick installation, having all components sit in their stock locations in the engine bay.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eTurbo Specifications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"603\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eBearing Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003eBall-Bearing\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFlange Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eStandard Subaru 5-Bolts\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" bgcolor=\"#CCCCCC\"\u003e\u003cstrong\u003eBillet Compressor Wheel:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eIn: 54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eEx: 72 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" height=\"27\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Wheel:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIn: 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx: 57 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Housing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e10cm\u003csup\u003e2\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eActuator:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.1 bar \/ 16 psi\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eHorsepower:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e500 HP\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDownpipe Specifications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\n\u003ctable width=\"500\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"173\" height=\"27\" bgcolor=\"#CCCCCC\"\u003eMaterial\u003c\/td\u003e\n\u003ctd width=\"317\" bgcolor=\"#CCCCCC\"\u003eStainless Steel SUS304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\n\u003ctable width=\"500\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"173\" height=\"27\"\u003ePipe Thickness\u003c\/td\u003e\n\u003ctd width=\"317\"\u003e0.25 Inch \/ 6.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\n\u003ctable width=\"500\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"173\" height=\"27\" bgcolor=\"#CCCCCC\"\u003eFlange Thickness\u003c\/td\u003e\n\u003ctd width=\"317\" bgcolor=\"#CCCCCC\"\u003e0.5 Inch \/ 12.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2002 - 2007 Subaru WRX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2004 - 2018 Subaru STi\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger (TR-TS1047)\u003c\/li\u003e\n\u003cli\u003eGaskets\u003c\/li\u003e\n\u003cli\u003eUpgraded Billet Actuator\u003c\/li\u003e\n\u003cli\u003eOil Drain Pipe\u003c\/li\u003e\n\u003cli\u003eWater Pipe\u003c\/li\u003e\n\u003cli\u003eTwin scroll Downpipe (TR-ES1005)\u003c\/li\u003e\n\u003cli\u003eDown pipe to Exhaust Gasket x1 \u003c\/li\u003e\n\u003cli\u003eDown pipe to Exhaust Nuts \u0026amp; Bolts x2\u003c\/li\u003e\n\u003cli\u003eExhaust Manifold (TR-ES1002)\u003c\/li\u003e\n\u003cli\u003eUp Pipe (TR-ES1002)\u003c\/li\u003e\n\u003cli\u003e50' x 2\" Exhaust Wrap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\u003cem\u003e\u003cb\u003eFor Off-Road Use Only\u003c\/b\u003e\u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\n\u003cem\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/em\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rte__table-wrapper\"\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175228226,"sku":"TR-TS1100","price":3290.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175260994,"sku":"TR-TS1100","price":3290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/TR-TS1100_620x600_3707e483-7815-46bf-b854-22959317298a.jpg?v=1778607536"},{"product_id":"tr-td06-20g-billet-wheel-twin-scroll-bolt-on-turbo-stock-replacement-for-subaru-wrx-2002-2007-sti-2004-2020","title":"TR TD06-20G Billet Wheel Twin Scroll Bolt On Turbo Stock Replacement for Subaru WRX 2002-2007 \u0026 STI 2004-2020","description":"\u003cp\u003eTomioka Racing TD06-20G Twin Scroll Turbo now comes in Billet compressor wheel! The billet material improves air flow and performance by at least 10% over standard wheel. This turbo is ideal if you’re looking to put down the highest amount of horsepower without having to convert to a rotated mount set up and maintaining fast spool. This turbo is 100% bolt-on* and will support 550HP. Perfect for track and street applications!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ctable width=\"500\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" bgcolor=\"#CCCCCC\" style=\"width: 150.923px;\"\u003eModel\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 403.281px;\"\u003eTD06-20G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"width: 150.923px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"width: 403.281px;\"\u003eTR-TS1027\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" bgcolor=\"#CCCCCC\" style=\"width: 150.923px;\"\u003e\u003cspan class=\"style3\"\u003eBearing \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 403.281px;\"\u003e\u003cspan class=\"style3\"\u003eJournal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"width: 150.923px;\"\u003eFlange\u003c\/td\u003e\n\u003ctd style=\"width: 403.281px;\"\u003eSTD Subaru 5 Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" colspan=\"2\" style=\"width: 150.923px;\"\u003eActuator\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 403.281px;\"\u003e1.1 BAR \/ 16 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"100\" rowspan=\"2\" style=\"width: 110.895px;\"\u003eCompressor Wheel\u003c\/td\u003e\n\u003ctd width=\"36\" style=\"width: 40.0284px;\"\u003eIn:\u003c\/td\u003e\n\u003ctd width=\"364\" style=\"width: 403.281px;\"\u003e52 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40.0284px;\"\u003eEx:\u003c\/td\u003e\n\u003ctd width=\"364\" style=\"width: 403.281px;\"\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\" rowspan=\"2\" style=\"width: 110.895px;\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 40.0284px;\"\u003eIn:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 403.281px;\"\u003e61 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 40.0284px;\"\u003eEx:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" style=\"width: 403.281px;\"\u003e54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" colspan=\"2\" style=\"width: 150.923px;\"\u003eMaximum Power\u003c\/td\u003e\n\u003ctd height=\"27\" style=\"width: 403.281px;\"\u003e530 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\" style=\"width: 150.923px;\"\u003eTurbine Housing\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\" style=\"width: 403.281px;\"\u003e8 cm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" colspan=\"2\" style=\"width: 150.923px;\"\u003eAir Flow Rate\u003c\/td\u003e\n\u003ctd height=\"27\" style=\"width: 403.281px;\"\u003e640 cfm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eTR-TS1047 Twin Scroll GTX2971\u003c\/th\u003e\n\u003cth\u003eTR-TS1027 Tomioka Racing TD06-20G Billet\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003e2002-2007 WRX, 2004-2018 STi\u003c\/td\u003e\n\u003ctd\u003e2002-2007 WRX, 2004-2020 STI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing Type\u003c\/td\u003e\n\u003ctd\u003eBall-Bearing\u003c\/td\u003e\n\u003ctd\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressor Wheel Material\u003c\/td\u003e\n\u003ctd\u003eBillet\u003c\/td\u003e\n\u003ctd\u003eBillet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressor Wheel Size (mm)\u003c\/td\u003e\n\u003ctd\u003eIn: 54, Ex: 72\u003c\/td\u003e\n\u003ctd\u003eIn: 52, Ex: 68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbine Wheel Size (mm)\u003c\/td\u003e\n\u003ctd\u003eIn: 60, Ex: 57\u003c\/td\u003e\n\u003ctd\u003eIn: 61, Ex: 54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbine Housing Size\u003c\/td\u003e\n\u003ctd\u003e10cm2\u003c\/td\u003e\n\u003ctd\u003e8cm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight of Compressor Wheel\u003c\/td\u003e\n\u003ctd\u003eLighter than competing turbos\u003c\/td\u003e\n\u003ctd\u003e10% improvement over standard wheel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel and Blade Design\u003c\/td\u003e\n\u003ctd\u003e20% larger wheel, 17% longer blades\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Housing\u003c\/td\u003e\n\u003ctd\u003ePort and polished to minimize turbulence\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Horsepower Support\u003c\/td\u003e\n\u003ctd\u003e550 HP\u003c\/td\u003e\n\u003ctd\u003e530 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpool Characteristics\u003c\/td\u003e\n\u003ctd\u003eTwin-scroll design for optimal spooling\u003c\/td\u003e\n\u003ctd\u003eFast spool, ideal for maintaining high HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eRequires twin-scroll headers and downpipe\u003c\/td\u003e\n\u003ctd\u003e100% bolt-on\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2002-2007 WRX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2004-2020 STI\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Contents:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eTurbocharger \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eActuator \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eOil \u0026amp; Water Pipe \u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 1.4em;\"\u003eGaskets \u0026amp; Hardware Kits\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175359298,"sku":"TR-TS1027","price":1750.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175392066,"sku":"TR-TS1027","price":1750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/dsc_4035_tr1027_for_web.jpg?v=1778607537"},{"product_id":"tr-gtx2971-stock-location-replacement-for-subaru-wrx-02-07-and-sti-04-21","title":"TR GTX2971 Stock Location Replacement for Subaru WRX 02-07 and STi 04-21","description":"\u003cp\u003eIntroducing the GTX2971! Featuring a ball-bearing cartridge, the GTX2971 allows for exceptionally crisp and strong throttle response just like that of its larger counterpart the GTX3076. Also packed with a billet compressor wheel, the overall weight of the wheel is lighter than other turbocharger wheels and allows for more room for air-flow. Thanks to the billet construction of the unique TR blades, durability goes unmatched, keeping the GTX2971 running through any condition. New to the TR GTX2971 and GTX3076 turbochargers are point-milled blades, which allow for reaching in all the small places between the blades to create a surface that provides maximum flow from the wheel design. In addition, the GTX2971 features a port and polished exhaust housing to minimize exhaust flow turbulence. This turbo is perfect for users who are looking for quick spooling and running moderate boost pressures. All necessary fittings and gaskets are included with purchase.\u003c\/p\u003e\n\u003ctable style=\"height: 297.869px;\" width=\"603\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 35.5966px;\"\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\" bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eBearing Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\" bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003eBall-Bearing\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.5966px;\"\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eFlange Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"height: 35.5966px;\"\u003e\n\u003cp\u003eStandard Subaru 5-Bolts\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 37.6562px;\"\u003e\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 149px; height: 39.2046px;\" bgcolor=\"#CCCCCC\" rowspan=\"2\"\u003e\u003cstrong\u003eCompressor Wheel:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 149px; height: 19.6023px;\" bgcolor=\"#CCCCCC\"\u003eIn: 52.73 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 149px; height: 19.6023px;\" bgcolor=\"#CCCCCC\"\u003eEx: 75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 149px; height: 39.2046px;\" height=\"27\" rowspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Wheel:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 192px; height: 19.6023px;\"\u003eIn: 55.63 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"width: 192px; height: 19.6023px;\"\u003eEx: 52.33 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.4176px;\"\u003e\n\u003ctd style=\"width: 149px; height: 39.4176px;\" bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Housing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 149px; height: 39.4176px;\" bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e10cm\u003csup\u003e2\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.5966px;\"\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eActuator:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\"\u003e\n\u003cp\u003e1.1 bar \/ 16 psi\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.5966px;\"\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\" bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eHorsepower:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 149px; height: 35.5966px;\" bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e500 HP\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cbr\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2002 - 2007 Subaru WRX\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2004 - 2018 Subaru STi\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eTurbocharger\u003cbr\u003eGaskets\u003cbr\u003eHardware Kit\u003cbr\u003eActuator\u003cbr\u003eOil Pipe\u003cbr\u003eWater Pipe\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175490370,"sku":"TR-TS1045","price":1965.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175523138,"sku":"TR-TS1045","price":1965.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/TR-TW1045_Web_Pic.jpg?v=1778607537"},{"product_id":"tr-td05-20g-ball-bearing-billet-wheel-bolt-on-turbo-stock-replacement-for-subaru-wrx-02-07-sti-04-21","title":"TR TD05-20G Ball Bearing Billet Wheel Bolt On Turbo Stock Replacement for Subaru WRX 02-07 \u0026 STi 04-21","description":"\u003cp\u003eSlow spool no more! Tomioka Racing’s TD05-20G for Subaru now comes in a ball bearing version. This latest offering breaks the myth of slow spooling TD05-20G. Armed with dual ceramic ball bearings and billet compressor wheel, this TD05-20G will spool close to a factory turbo with the right tune. The configuration provides balanced \u0026amp; improved air flow to the TD05 frame. The faster spooling TD05-20G will inject more driving excitement to your daily Subaru. You can expect the same seamless fitment from this new turbo as its TD05-20G predecessor.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eTurbo Characteristics:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ctable width=\"656\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003eBearing Type:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eBall Bearing\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003eFlange Type:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eStandard Subaru 5-Bolts\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" width=\"100\"\u003e\n\u003cp\u003eCompressor Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"36\"\u003e\n\u003cp\u003eIn:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"364\"\u003e\n\u003cp\u003e52.5 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eEx:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"364\"\u003e\n\u003cp\u003e68 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eIn:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e56 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eEx:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e49.2 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003eActuator:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.1 bar \/ 16 psi (Optional 1.3 bar)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003eTurbine Housing:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e8 cm2\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003eMax. Power:\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e480 HP\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\n\u003cbr\u003eSpecifications:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDual Ceramic Ball Bearing\u003c\/li\u003e\n\u003cli\u003eBillet Compressor Wheel\u003c\/li\u003e\n\u003cli\u003eFast Spool\u003c\/li\u003e\n\u003cli\u003eBolt-On\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eKit Contents:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eGasket\u003c\/li\u003e\n\u003cli\u003eHardware Kit\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eApplications:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2002 - 2007 Subaru WRX\u003c\/li\u003e\n\u003cli\u003e2004 – 2018 Subaru STi\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175621442,"sku":"TR-TS1050","price":1800.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175654210,"sku":"TR-TS1050","price":1800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/TR-TS1050_1__web.jpg?v=1778607538"},{"product_id":"tr-billet-wheel-td05-16g-turbocharger-stock-replacement-for-subaru-wrx-2002-2007-sti-2004-2020","title":"TR Billet Wheel TD05-16G Turbocharger Stock Replacement for Subaru WRX 2002-2007 \u0026 STI 2004-2021","description":"\u003cp\u003eOne of the most popular TD05-16G replacement turbocharger now comes in billet compressor wheel. Supersize your mild upgrade from the factory VF turbo. The billet compressor wheel improves air flow by at least 10% over TD05-16G in standard compressor wheel which results in higher horse power capacity. The turbo comes with all fitting and gaskets, ready to bolt on out of the box. The best all around turbo upgrade just got better!\u003c\/p\u003e\n\u003ch3\u003eTurbo Characteristics:\u003c\/h3\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e Type:\u003c\/td\u003e\n\u003ctd\u003eTD05-16G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing:\u003c\/td\u003e\n\u003ctd\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlange:\u003c\/td\u003e\n\u003ctd\u003eStandard Subaru 5 Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompressor Diameter:\u003c\/td\u003e\n\u003ctd\u003eInlet = 48.3 mm | Outlet = 68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbine Diameter:\u003c\/td\u003e\n\u003ctd\u003eInlet = 56 mm | Outlet = 49.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTurbo Boost:\u003c\/td\u003e\n\u003ctd\u003e1.1 bar \/ 16 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Power:\u003c\/td\u003e\n\u003ctd\u003e400 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan\u003eAPPLICATIONS\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2002-2007 Subaru WRX\u003c\/li\u003e\n\u003cli\u003e2004-2021 Subaru STI\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKit Contents:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTurbocharger\u003c\/li\u003e\n\u003cli\u003eActuator\u003c\/li\u003e\n\u003cli\u003eOil Pipe\u003c\/li\u003e\n\u003cli\u003eWater Pipe\u003c\/li\u003e\n\u003cli\u003eGaskets \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175686978,"sku":"TR-TS1024","price":1265.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175719746,"sku":"TR-TS1024","price":1265.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/frontforwebdsc_4715.jpg?v=1778607538"},{"product_id":"tr-gtx3076-stock-replacement-for-subaru-wrx-02-07-and-sti-04-21","title":"TR GTX3076 Stock Replacement for Subaru WRX 02-07 and STi 04-21","description":"\u003cp\u003eIntroducing the GTX3076! Featuring a ball-bearing cartridge, the GTX3076 allows for exceptionally crisp and strong throttle response paired with faster spooling. Also packed with a billet compressor wheel, the overall weight of the wheel is lighter than other turbocharger wheels and allows for more room for air flow. Thanks to the billet construction of the unique TR blades, durability goes unmatched, keeping the GTX30 running for years to come. New to the TR GTX2971 and GTX3076 turbochargers are point-milled blades,\u003cspan\u003e which allow for reaching in all the small places between the blades to create a surface that provides maximum flow from the wheel design. In addition, the GTX3076 features a port and polished exhaust housing to minimize exhaust flow turbulence. \u003c\/span\u003eThis turbo is perfect for users who are looking for quick spooling and running moderately high boost pressures. All necessary fittings and gaskets are included in the box to make the installation process painless.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"603\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eBearing Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003eBall-Bearing\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFlange Type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eStandard Subaru 5-Bolts\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" bgcolor=\"#CCCCCC\"\u003e\u003cstrong\u003eCompressor Wheel:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eIn: 57 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eEx: 81 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd rowspan=\"2\" height=\"27\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Wheel:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIn: 59 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx: 53.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eTurbine Housing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e10cm\u003csup\u003e2\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eActuator:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.1 bar \/ 16 psi\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e\u003cstrong\u003eHorsepower:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003e\n\u003cp\u003e550 HP\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2002 - 2007 Subaru WRX\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e2004 - 2021 Subaru STi\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTurbocharger\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eGaskets\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHardware Kit\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eActuator\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOil Pipe\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWater Pipe\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175850818,"sku":"TR-TS1046","price":2280.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175883586,"sku":"TR-TS1046","price":2280.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/TR-TW1046_Web_Pic.jpg?v=1778607540"},{"product_id":"tr-billet-td05-18g-bolt-on-turbo-stock-replacement-for-subaru-impreza-wrx-2002-2007-sti-2004-2020","title":"TR Billet TD05-18G Bolt On Turbo Stock Replacement for Subaru Impreza WRX 2002-2007 \u0026 STI 2004-2021","description":"\u003cp\u003eThe TD05-18G turbo is for a street\/track car. The new billet TD05-18G turbo is rated for 450 HP and maintaining street street drivability. With lighter and stronger wheel blades than the TR TD05-20G. This turbo can handle mid to high-end horsepower without significant lag time compared to stock turbo!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"500\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eBearing Type:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eFlange Type:\u003c\/td\u003e\n\u003ctd\u003eStandard Subaru 5-Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"100\" bgcolor=\"#CCCCCC\" rowspan=\"2\"\u003eCompressor Wheel\u003c\/td\u003e\n\u003ctd width=\"36\" bgcolor=\"#CCCCCC\"\u003eIn:\u003c\/td\u003e\n\u003ctd width=\"364\" bgcolor=\"#CCCCCC\"\u003e52.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eEx:\u003c\/td\u003e\n\u003ctd width=\"364\" bgcolor=\"#CCCCCC\"\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" rowspan=\"2\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIn:\u003c\/td\u003e\n\u003ctd\u003e56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx:\u003c\/td\u003e\n\u003ctd\u003e49.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eActuator:\u003c\/td\u003e\n\u003ctd height=\"27\" bgcolor=\"#CCCCCC\"\u003e1.1 Bar \/ 16 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" colspan=\"2\"\u003eTurbine Housing:\u003c\/td\u003e\n\u003ctd height=\"27\"\u003e8cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eMax. Power:\u003c\/td\u003e\n\u003ctd height=\"27\" bgcolor=\"#CCCCCC\"\u003e440 HP (41lbs\/min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2002-2007 Subaru WRX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2004-2020 Subaru STI\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e•Turbocharger\u003cbr\u003e•Gaskets\u003cbr\u003e•Actuator\u003cbr\u003e•Oil Pipe\u003cbr\u003e•Water Pipe\u003cbr\u003e•Hardware Kits\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190175949122,"sku":"TR-TS1021","price":1265.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190175981890,"sku":"TR-TS1021","price":1265.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/TR-TS1021_1__620x600_96934fd3-4d6e-47bd-89bc-7be56fe77eef.jpg?v=1778607540"},{"product_id":"tr-billet-wheel-gt30-ball-bearing-turbo","title":"TR Billet Wheel GT30 Ball Bearing Turbo","description":"\u003cdiv\u003eIntroducing Tomioka Racing Billet Wheel Ball Bearing turbo series. The ball bearing turbocharger utilizes genuine Garrett ball bearing technology. Tomioka Racing’s Billet compressor wheel improves air flow by at least 10% and the smallest of the ball bearing turbo is perfect for 4-Cylinder applications and those looking for quick response. Coupled with Tomioka Racing’s stainless steel turbine housing, this ball bearing turbo is made for quick spool and improved top-end power compared to standard wheel. Choose from many configurations on the stainless turbine housing from T3 inlets to 3-Inch V-Band and 0.63AR to 1.06AR. The stainless steel turbine housing is also available separately for those who intend to run GTX30 or GTX35 turbocharger.\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003eSee this kit in action at PRE Racing Subaru BRZ \/ Scion FRS turbo kit set up \u003ca href=\"http:\/\/www.tomiokaracing.com\/index.php\/tr-tu3005.html%20\"\u003ehere\u003c\/a\u003e !\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e \u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e \u003cbr\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"500\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" bgcolor=\"#cccccc\"\u003eBearing Type:\u003c\/td\u003e\n\u003ctd bgcolor=\"#cccccc\"\u003eBall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eFlange Type:\u003c\/td\u003e\n\u003ctd\u003eT3 or V-Band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" height=\"27\" bgcolor=\"#cccccc\"\u003eActuator:\u003c\/td\u003e\n\u003ctd height=\"27\" bgcolor=\"#cccccc\"\u003eExternal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" height=\"27\"\u003eTurbine Housing:\u003c\/td\u003e\n\u003ctd height=\"27\"\u003e0.63\/ 0.82 \/ 1.06 AR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" height=\"27\" bgcolor=\"#cccccc\"\u003eMax. Power:\u003c\/td\u003e\n\u003ctd height=\"27\" bgcolor=\"#cccccc\"\u003e620 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e• Turbocharger\u003cbr\u003e• Gaskets\u003cbr\u003e• Hardware kits\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"0.82 A\/R Stainless Steel Turbine Housing with T3 Inlet \u0026 V-band Outlet  (TR-TU3007)","offer_id":53190179488066,"sku":"TR-TU3007","price":2050.0,"currency_code":"USD","in_stock":true},{"title":"1.06 A\/R Stainless Steel Turbine Housing with T3 Inlet \u0026 V-band Outlet (TR-TU3008)","offer_id":53190179520834,"sku":"TR-TU3008","price":2050.0,"currency_code":"USD","in_stock":true},{"title":"0.82 A\/R Stainless Steel Turbine Housing with V-Band \u0026 Outlet (TR-TU3005)","offer_id":53190179553602,"sku":"TR-TU3005","price":2050.0,"currency_code":"USD","in_stock":true},{"title":"1.06 A\/R Stainless Steel Turbine Housing with V-Band \u0026 Outlet (TR-TU3006)","offer_id":53190179586370,"sku":"TR-TU3006","price":2050.0,"currency_code":"USD","in_stock":true},{"title":"0.63 A\/R Stainless Steel Turbine Housing with V-Band \u0026 Outlet (TR-TU3009)","offer_id":53190179619138,"sku":"TR-TU3009","price":2050.0,"currency_code":"USD","in_stock":true},{"title":"0.63 A\/R Stainless Steel Turbine Housing with T3 Inlet \u0026 V-band Outlet (TR-TU3010)","offer_id":53190179651906,"sku":"TR-TU3010","price":2050.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/fam_2.jpg?v=1778607543"},{"product_id":"tr-td05-20g-turbo-w-billet-wheels-stock-replacement-for-subaru-impreza-wrx-2002-2007-sti-2004-2020","title":"TR TD05-20G Turbo w\/ Billet Wheels Stock Replacement for Subaru Impreza WRX 2002-2007 \u0026 STi 2004-2020","description":"\u003cp\u003eThe popular stock replacement TR TD05-20G turbo now comes in billet wheel. Potentially increasing performance from VF39 and TD04 turbo and at least 10% more efficient than the regular TD05-18G. The billet upgrade has a rating of 400HP, a truly perfect turbo for daily driving Subaru!\u003cbr\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"500\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eBearing Type:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eFlange Type:\u003c\/td\u003e\n\u003ctd\u003eStandard Subaru 5-Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"100\" rowspan=\"2\"\u003eCompressor Wheel\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"36\"\u003eIn:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"364\"\u003e50.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\"\u003eEx:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" width=\"364\"\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" rowspan=\"2\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003eIn:\u003c\/td\u003e\n\u003ctd\u003e56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx:\u003c\/td\u003e\n\u003ctd\u003e49.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eActuator:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\"\u003e1.1 Bar \/ 16 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"27\" colspan=\"2\"\u003eTurbine Housing:\u003c\/td\u003e\n\u003ctd height=\"27\"\u003e8cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eMax. Power:\u003c\/td\u003e\n\u003ctd bgcolor=\"#CCCCCC\" height=\"27\"\u003e480 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e2002-2007 WRX\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e2004-2020 STI\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 19.600000381469727px;\"\u003eTurbocharger\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eGaskets\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eActuator\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eOil Pipe\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-size: 1.4em;\"\u003eWater Pipe\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 1.4em;\"\u003eHardware Kits\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"1.1 bar","offer_id":53190179750210,"sku":"TR-TS1018","price":1570.0,"currency_code":"USD","in_stock":true},{"title":"1.3 bar","offer_id":53190179782978,"sku":"TR-TS1018","price":1570.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/ts1018-1.jpg?v=1778607544"},{"product_id":"tr-td05-18g-bolt-on-turbo-stock-replacement-for-subaru-wrx-2002-2007-and-sti-2002-2010-w-billet-actuator","title":"TR TD05-18G Bolt On Turbo Stock Replacement for Subaru WRX 2002-2007 and STI 2002-2010 w\/ Billet Actuator","description":"\u003cp\u003eThe TR TD05-18G Turbo is the one of the best turbo upgrade for your street car. The turbo characteristics are very similar to factory VF42 turbo but with an increased spool rate and capacity to handle power upwards of 350WHP so it makes a great addition to your engine if you are planning to keep your car daily driver friendly. The turbo comes with all fitting and gaskets, ready to bolt on out of the box.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eTurbo Characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"height: 198.515px;\" width=\"500\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" colspan=\"2\"\u003eBearing Type:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\"\u003eJournal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\" colspan=\"2\"\u003eFlange Type:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003eStandard Subaru 5-Bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 39.1796px;\" bgcolor=\"#CCCCCC\" width=\"100\" rowspan=\"2\"\u003eCompressor Wheel\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" width=\"36\"\u003eIn:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" width=\"364\"\u003e50.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\"\u003eEx:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\" bgcolor=\"#CCCCCC\" width=\"364\"\u003e68 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 39.1796px;\" height=\"27\" rowspan=\"2\"\u003e\n\u003cp\u003eTurbine Wheel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003eIn:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003e56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003eEx:\u003c\/td\u003e\n\u003ctd style=\"height: 19.5898px;\"\u003e49.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.9922px;\"\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eActuator:\u003c\/td\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\"\u003e1.1 Bar \/ 16 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.9922px;\"\u003e\n\u003ctd style=\"height: 26.9922px;\" height=\"27\" colspan=\"2\"\u003eTurbine Housing:\u003c\/td\u003e\n\u003ctd style=\"height: 26.9922px;\" height=\"27\"\u003e7 cm2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.9922px;\"\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\" colspan=\"2\"\u003eMax. Power:\u003c\/td\u003e\n\u003ctd style=\"height: 26.9922px;\" bgcolor=\"#CCCCCC\" height=\"27\"\u003e400 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e• Turbocharger\u003cbr\u003e• Actuator\u003cbr\u003e• Oil Pipe\u003cbr\u003e• Water Pipe\u003cbr\u003e• Gaskets\u003cbr\u003e• Hardware kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication: \u003c\/strong\u003eSubaru GDA-GDB WRX\/STI 2002-2015, GC8 1998-2001, Forester SG5 2005-2007\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWastegate actuator spring choice: 1.1 bar vs 1.3 bar (what customers need to know)\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eWhat the spring actually controls (and why it matters)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOn a pneumatic internal wastegate, the actuator spring sets your gate pressure (often called base boost): the boost level where the wastegate starts to open because boost pressure overcomes spring force. Haltech describes it simply: changing spring pressure changes the default boost pressure, and when boost exceeds spring pressure the valve opens and begins regulating boost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.1 bar (16.1 psi) \/ Red if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou want a lower boost map (street\/traction\/valet) around the mid-teens. Remember: you can’t go under the spring.\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 18–22 psi and you want good controller authority and flexibility.\u003c\/p\u003e\n\u003cp\u003eYou’re building a setup where drivability and multiple boost modes matter (daily + weekend map).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eChoose 1.3 bar (19.1 psi) \/ Silver if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou will not run low boost—your “low boost” is still ~19 psi or higher. (If you need 15–17 psi sometimes, don’t pick this.)\u003c\/p\u003e\n\u003cp\u003eYour normal target boost is roughly 22–28 psi and you want:\u003c\/p\u003e\n\u003cp\u003eless “work” from the boost control system to hit target, and\u003c\/p\u003e\n\u003cp\u003etypically better resistance to the wastegate being pushed open early (especially in higher load \/ backpressure situations).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThere are two different “maximum boost” questions people ask:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1) Maximum boost your boost control can hold consistently\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUsing the GFB rule-of-thumb (target boost ≤ ~2× gate pressure) :\u003c\/p\u003e\n\u003cp\u003eWith a 1.1 bar \/ 16.1 psi spring, the “control stability ceiling” is roughly ~32 psi (2 × 16.1).\u003c\/p\u003e\n\u003cp\u003eWith a 1.3 bar \/ 19.1 psi spring, the “control stability ceiling” is roughly ~38 psi (2 × 19.1).\u003c\/p\u003e\n\u003cp\u003eReality check: that does not mean “safe to run 32–38 psi.” It means beyond ~2× gate pressure, boost control tends to get inconsistent because the actuator isn’t receiving enough meaningful reference signal for correction. GFB explains that once you go beyond double, boost control becomes less stable and more affected by variables like RPM\/load\/backpressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2) Maximum boost your turbo\/engine can safely run\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat’s not spring-limited. It’s limited by:\u003c\/p\u003e\n\u003cp\u003eturbo efficiency and speed\/heat,\u003c\/p\u003e\n\u003cp\u003efuel quality and knock margin,\u003c\/p\u003e\n\u003cp\u003eintake temps\/intercooling,\u003c\/p\u003e\n\u003cp\u003eexhaust backpressure,\u003c\/p\u003e\n\u003cp\u003eengine\/clutch\/trans limits,\u003c\/p\u003e\n\u003cp\u003etuner strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFAQ:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run less boost than the spring rating?\u003c\/strong\u003e\u003cbr\u003eNo. Spring pressure is the lowest boost level you can reach.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes a stiffer spring automatically mean higher peak boost?\u003c\/strong\u003e\u003cbr\u003eNot automatically. It mainly raises minimum boost and changes how the wastegate behaves. Boost above spring comes from the control strategy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do people say “don’t exceed 2× the spring”?\u003c\/strong\u003e\u003cbr\u003eBecause boost control gets less stable as target boost gets too far above gate pressure; beyond ~double you tend to lose correction authority.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat spring gives the best spool and boost stability?\u003c\/strong\u003e\u003cbr\u003eA spring that puts gate pressure about 10–20% under your target boost is a strong general guideline for best performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Tomioka Racing (TR)","offers":[{"title":"Default Title","offer_id":53190183190850,"sku":"TR-TS1000","price":1095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/dsc_137911.jpg?v=1778607545"}],"url":"https:\/\/autospecdesign.com\/collections\/turbo-04-07-sti.oembed","provider":"AutoSpec Design","version":"1.0","type":"link"}