Manley 04+ Subaru WRX STi (EJ257) 75mm DE-STROKED 99.75mm +.25mm Bore 8.5:1 Dish Piston Set w/ Rings

Our 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.

• Chrome Moly Wrist Pins: Premium Chrome Moly wrist pins come standard with our Standard Series Pistons. For select SKUs, we offer wrist pin upgrades to 9310 and Turbo Tuff/DLC alloys, providing additional durability.
• 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.
• Exacting Ring Lands and Grooves: We adhere to strict standards for piston ring lands and grooves, resulting in enhanced ring seal and more power.
• Cam and Barrel Profiles: Our pistons boast cam and barrel (skirt) profiles that generate substantial power while being gentle on cylinder walls.
• 2618 Alloy Forgings: We use domestic 2618 alloy forgings, ensuring superior strength and performance.

Upgrade your Subaru WRX STi with the Manley Performance EJ257 75mm De-Stroked Piston Set, designed for high-performance engine builds and reliable power delivery. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength and durability for demanding applications. The unique cam and barrel (skirt) profiles are engineered to generate substantial horsepower while maintaining gentle contact with the cylinder walls, promoting engine longevity and efficiency. This set also features strict manufacturing standards for ring lands and grooves, ensuring optimal ring seal and improved power output.
The pistons come equipped with chrome moly wrist pins as standard, with options for upgrade to 9310 or Turbo Tuff/DLC alloys for enhanced durability under extreme conditions. Manley's proprietary fixturing process allows for precise skirt turning and ring groove machining in a single operation, guaranteeing perfect ring-to-skirt squareness and sealing characteristics.
Designed specifically to fit 2004-2007 Subaru Impreza models, these pistons are ideal for enthusiasts and professional tuners aiming for reliable performance with a high-quality finish. Please note that these pistons are not carb compliant and require proper acknowledgment for use in regulated environments. Their construction supports high-performance applications, making them an excellent choice for engine builders seeking superior piston technology with proven results.

Features:

• 2618 alloy forgings for superior strength and performance

• Proprietary cam and barrel profiles for power and cylinder wall safety

• Chrome moly wrist pins as standard, with upgrade options available

• Exacting ring lands and grooves for enhanced sealing and power

• Unique fixturing for precise skirt turning and ring groove machining

Fitment:
Subaru Impreza WRX 2006
Subaru Impreza WRX 2007
Subaru Impreza WRX 2008
Subaru Impreza WRX 2009
Subaru Impreza WRX 2010
Subaru Impreza WRX 2011
Subaru Impreza WRX 2012
Subaru Impreza WRX Limited 2006
Subaru Impreza WRX Limited 2007
Subaru Impreza WRX Limited 2010
Subaru Impreza WRX Limited 2011
Subaru Impreza WRX Limited 2012
Subaru Impreza WRX Premium 2009
Subaru Impreza WRX Premium 2010
Subaru Impreza WRX Premium 2011
Subaru Impreza WRX Premium 2012
Subaru Impreza WRX STI 2004
Subaru Impreza WRX STI 2005
Subaru Impreza WRX STI 2006
Subaru Impreza WRX STI 2007
Subaru Impreza WRX STI 2008
Subaru Impreza WRX STI 2009
Subaru Impreza WRX STI 2010
Subaru Impreza WRX STI 2011
Subaru Impreza WRX STI 2012
Subaru Impreza WRX STI Limited 2007
Subaru Impreza WRX STI Limited 2011
Subaru Impreza WRX STI Limited 2012
Subaru Impreza WRX STI Special Edition 2010
Subaru Impreza WRX TR 2006
Subaru Impreza WRX TR 2007