Manley 04+ Subaru WRX STi (EJ257) STD Stroke 100mm +.5mm Bore 8.5:1 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 models from 2004 to 2012 equipped with the EJ257 engine. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength and durability for high-performance applications. The cam and barrel profiles are engineered to produce significant power while maintaining a gentle impact on your cylinder walls, ensuring longevity and reliable operation during demanding driving conditions. Featuring proprietary fixturing, Manley pistons are machined to achieve perfect ring land and groove squareness in a single operation, which enhances ring sealing and boosts engine efficiency.

The set includes chrome moly wrist pins as standard, providing a robust connection between the piston and connecting rod. For select models, optional upgrades to 9310 or Turbo Tuff/DLC alloy wrist pins are available, offering increased durability for high-stress environments. The pistons are coated with moly skirt coatings on certain part numbers to reduce friction and wear, extending service life. Designed with precise ring lands and grooves, these pistons improve sealing and combustion efficiency, ultimately delivering more power on the road or track.

Manufactured domestically, Manley’s pistons are trusted by professional engine builders and tuners for their superior performance and quality. This set is compatible with Subaru WRX STI models from 2004 through 2012, making it an ideal upgrade for enthusiasts seeking to enhance their vehicle’s performance with reliable, high-quality components. Please note that these pistons are not CARB-compliant but require carb acknowledgment prior to installation. They are not suitable for air freight shipping but can be shipped via LTL freight. Enhance your Subaru's engine with the durability and power of Manley’s Platinum Series pistons for a trusted upgrade that supports your performance goals.

Features:

• Made from 2618 alloy forgings for superior strength and durability

• Cam and barrel profiles optimized for high power output

• Unique fixturing ensures precise ring land and groove machining

• Includes chrome moly wrist pins; upgrade options available for higher durability

• Moly skirt coatings on select part numbers to reduce friction and wear

Fitment:
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