Manley Performance EJ257 Subaru WRX STI Piston Set with Rings - 04+ Models, STD Stroke, +.5mm Bore

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.

The Manley Performance EJ257 piston set is designed specifically for 2004 and newer Subaru WRX STI models, offering exceptional strength and performance for high-performance engine builds. Crafted from premium 2618 alloy forgings, these pistons deliver superior durability and thermal stability, making them ideal for both street and racing applications. The set includes pistons with a standard 100mm stroke and a +.5mm bore, providing a reliable upgrade for enthusiasts seeking increased power and efficiency.
Manley's pistons feature cam and barrel profiles optimized to generate substantial power while being gentle on cylinder walls, ensuring longevity and consistent performance. Each piston is machined with precise ring lands and grooves, adhering to strict quality standards to improve ring seal and boost engine output. The unique fixturing process used during manufacturing allows for skirt turning and ring groove machining in a single operation, ensuring perfect squareness and fitment.
Standard components include chrome moly wrist pins, which provide excellent durability, with options to upgrade to 9310 or Turbo Tuff/DLC alloys for enhanced resistance under demanding conditions. These pistons are compatible with a wide range of Subaru Impreza models from 2004 to 2012, offering a versatile solution for engine builders. Please note that these pistons are not carb approved but require carb acknowledgment during installation. They are suitable for air freight shipping and are intended for professional use. Trust Manley's expertise and quality craftsmanship to deliver the performance and reliability your high-powered Subaru engine demands.

Features:

• 2618 alloy forgings for superior strength and durability

• Cam and barrel (skirt) profiles designed for power and minimal wear

• Exacting ring lands and grooves for enhanced sealing and performance

• Unique fixturing ensures precise ring groove to skirt squareness

• Chrome moly wrist pins standard, with upgrade options to 9310 and Turbo Tuff/DLC alloys

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

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1