Manley Performance EJ257 STD Stroke 99.75mm +0.25mm Bore Piston Set for Subaru WRX STI

Description

The Manley Performance EJ257 piston set is engineered for high-performance Subaru WRX STI applications, offering durability and power for enthusiasts and professional tuners alike. Crafted from premium 2618 alloy forgings, these pistons deliver exceptional strength and resilience under demanding conditions. Their design incorporates proven cam and barrel skirt profiles that optimize power output while minimizing stress on the cylinder walls, ensuring long-lasting performance in turbocharged engines. The set includes chrome moly wrist pins as standard, with options for upgraded 9310 or Turbo Tuff/DLC alloys for enhanced durability where needed. Meticulously machined ring lands and grooves improve ring seal, resulting in better compression and increased horsepower. Unique fixturing technology allows for precise skirt turning and ring groove machining in a single operation, guaranteeing optimal ring-to-skirt squareness for reliable sealing and performance. These pistons are designed to fit 2004-2012 Subaru Impreza models equipped with EJ257 engines, with a bore of +0.25mm and a stroke of 99.75mm, providing an ideal solution for engine rebuilds or performance upgrades. Please note that these pistons are not CARB approved and require carb acknowledgment during installation. They are suitable for air freight and are a preferred choice for professional engine builders seeking proven quality and performance in their Subaru builds.

Features:

• 2618 alloy forgings for superior strength and durability

• Proven cam and barrel skirt profiles for optimized power

• Chrome moly wrist pins included, with optional upgraded alloys

• Precise ring lands and grooves for enhanced sealing and compression

• Unique fixturing for accurate skirt turning and ring groove machining

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