Manley 2004-2012 Subaru WRX STi (EJ257) 83mm Stroker 100mm +0.5mm Bore 9.8:1 Dish Piston Set with Rings | 622105C-4

Fitment Information:

• Subaru WRX 2006-2012
• Subaru STI 2004-2012

Manley 83mm Stroker 100mm +0.5mm Bore 9.8:1 Dish 4 Piston Set with Rings

Manley's signature “Platinum Series” pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability.
2618 Alloy Forgings: They use domestic 2618 alloy forgings, ensuring superior strength and performance. Chrome Moly Wrist Pins: Premium Chrome Moly wrist pins come standard with their Standard Series Pistons. For select SKUs, wrist pin upgrades to 9310 and Turbo Tuff/DLC alloys, providing additional durability. Exacting Ring Lands and Grooves: adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power. Cam and Barrel Profiles: Their pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls. Unique Fixturing: Manley’s unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.