{"product_id":"manley-valve-spring-and-retainer-kit-w-o-valve-locks-16-each-wrx-02-14-sti-04-21-26180","title":"Manley Valve Spring and Retainer Kit w\/o Valve Locks (16 each) WRX 02-14 \/ STI 04-21 | 26180","description":"\u003cp data-start=\"535\" data-end=\"800\"\u003e\u003cstrong\u003eProduct Fitment: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"535\" data-end=\"800\"\u003e2004-2021 Subaru STI\u003c\/p\u003e\n\u003cp data-start=\"535\" data-end=\"800\"\u003e2002-2014 Subaru WRX\u003c\/p\u003e\n\u003cp data-start=\"535\" data-end=\"800\"\u003eWhen you’re upgrading your turbo Subaru EJ‑series engine (WRX, STI, LGT, FXT), the valvetrain must keep up with increased lift, higher revs and boosted conditions. The Manley Performance Valve Spring \u0026amp; Retainer Kit (Part 26180) is built to deliver that reliability.\u003c\/p\u003e\n\u003cp data-start=\"802\" data-end=\"1192\"\u003eEach kit features high‑tensile chrome‑silicon alloy single‑conical springs combined with aerospace‑grade titanium CNC‑machined retainers. The springs are optimized to maintain proper pressure, resist fatigue and deliver precise valve control even under aggressive camshafts or high RPMs. Retainers are manufactured to extremely tight tolerances, supporting reliable, repeatable performance.\u003c\/p\u003e\n\u003cp data-start=\"1194\" data-end=\"1229\"\u003e\u003cstrong data-start=\"1194\" data-end=\"1227\"\u003eKey Features \u0026amp; Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1230\" data-end=\"1700\"\u003e\n\u003cli data-start=\"1230\" data-end=\"1305\"\u003e\n\u003cp data-start=\"1232\" data-end=\"1305\"\u003eSPRING TYPE: Single‑conical ovate wire design for superior fatigue life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1306\" data-end=\"1349\"\u003e\n\u003cp data-start=\"1308\" data-end=\"1349\"\u003eOUTER \/ INNER DIAMETER: 1.050\" \/ 0.755\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1350\" data-end=\"1431\"\u003e\n\u003cp data-start=\"1352\" data-end=\"1431\"\u003ePRESSURES: 60 lbs @ 1.420\" install height; 151 lbs @ 1.050\"; 187 lbs @ 0.895\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1432\" data-end=\"1481\"\u003e\n\u003cp data-start=\"1434\" data-end=\"1481\"\u003eMAX NET LIFT: 0.525\" | STOCK NET LIFT: 0.370\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1482\" data-end=\"1512\"\u003e\n\u003cp data-start=\"1484\" data-end=\"1512\"\u003eRATE: Approx. 245 lbs\/inch\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1513\" data-end=\"1574\"\u003e\n\u003cp data-start=\"1515\" data-end=\"1574\"\u003eINCLUDES: Set of 16 valve springs + 16 titanium retainers\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1702\" data-end=\"2122\"\u003e\u003cstrong data-start=\"1702\" data-end=\"1726\"\u003eWhy Choose This Kit?\u003c\/strong\u003e\u003cbr data-start=\"1726\" data-end=\"1729\"\u003eUpgrading your springs and retainers is a foundational step when optimizing for track, high‑rev or boosted performance. This Manley kit ensures your valvetrain remains tightly controlled, prevents valve float or bounce, and offers the durability needed for sustained high‑performance operation. It’s especially recommended if you’ve increased lift, modified heads or are pushing the rev limit.\u003c\/p\u003e\n\u003cp data-start=\"2124\" data-end=\"2158\"\u003e\u003cstrong data-start=\"2124\" data-end=\"2156\"\u003eFitment \u0026amp; Installation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2159\" data-end=\"2603\"\u003e\n\u003cli data-start=\"2276\" data-end=\"2399\"\u003e\n\u003cp data-start=\"2278\" data-end=\"2399\"\u003eRecommend full engine disassembly for installation: removal of camshafts, valve covers and proper spring tools required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2400\" data-end=\"2491\"\u003e\n\u003cp data-start=\"2402\" data-end=\"2491\"\u003eAfter installation, verify valve clearances, spring seat pressures and retainer seating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2492\" data-end=\"2603\"\u003e\n\u003cp data-start=\"2494\" data-end=\"2603\"\u003eIdeal for builds where reliability during high RPM, aggressive valve motion or boost conditions is critical\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Manley Performance","offers":[{"title":"Default Title","offer_id":51573014856002,"sku":"26180","price":324.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/9294\/3170\/files\/Manley-Valve-Spring-and-Retainer-Kit-wo-Valve-Locks-16-each-WRX-02-14-STI-04-21-26180.webp?v=1764075078","url":"https:\/\/autospecdesign.com\/products\/manley-valve-spring-and-retainer-kit-w-o-valve-locks-16-each-wrx-02-14-sti-04-21-26180","provider":"AutoSpec Design","version":"1.0","type":"link"}