Manley 04+ Subaru WRX STi (EJ257) STD Stroke 99.5mm STD Bore 9.8:1 Dish Piston Set with 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 Platinum Series piston set designed specifically for 2004 to 2007 models with the EJ257 engine. These pistons feature high-strength 2618 alloy forgings, providing exceptional durability and power under demanding conditions. The cam and barrel profiles are engineered to deliver substantial horsepower while minimizing wear on your engine's cylinder walls. Precision-machined ring lands and grooves enhance seal integrity, ensuring optimal compression and performance. The unique fixturing process used during manufacturing guarantees ring groove to skirt squareness, which is critical for reliable operation and longevity.
Chrome Moly wrist pins come standard, offering reliable connection between the piston and connecting rod. For increased durability, select part numbers include upgraded wrist pins made from 9310 or Turbo Tuff/DLC alloys, ideal for high-performance applications. The pistons are designed with moly skirt coatings on select models, reducing friction and wear during operation. These features make the Manley Platinum Series pistons a preferred choice among professional engine builders and tuners seeking superior quality and performance.
Compatibility with Subaru Impreza models from 2004 to 2007 makes this set a versatile upgrade for enthusiasts and racers. Proper installation and adherence to the specified compression ratio ensure optimal engine performance. Note that these pistons are not CARB approved and require carb acknowledgment during installation. Whether you're building a high-performance street engine or preparing for racing, the Manley Platinum Series pistons are engineered to meet the demands of serious automotive enthusiasts.

Features:

• 2618 alloy forging: Provides high strength and durability for demanding engine applications

• Cam and barrel profiles: Designed to generate substantial power while being gentle on cylinder walls

• Exacting ring lands and grooves: Enhance ring seal for improved compression and power

• Unique fixturing process: Ensures precise ring groove to skirt squareness during manufacturing

• Chrome Moly wrist pins: Standard for reliable piston connection; optional upgrades available for increased durability

• Moly skirt coatings: Reduce friction and wear for select part numbers

• Optimized design for Subaru WRX STI (2004-2007): Fits specific models with high-performance capabilities

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