JE Pistons Subaru STI EJ257 100mm Bore CR 8.5:1 Forged Piston Kit

Description

Upgrade your Subaru Impreza engine with the JE Pistons SUB STI EJ257 100mm bore CR 8.5:1 forged piston kit, crafted for high-performance applications. Designed specifically for 2004 to 2007 Subaru Impreza models, this piston kit delivers exceptional durability and power optimized for racing and spirited driving. Each piston is engineered from high-strength 2618 aluminum, forged and machined entirely in the USA to meet demanding performance standards. The kit includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings, ensuring reliable performance and easy installation.
JE Pistons’ proprietary Forged Side Relief (FSR) forging design reduces friction and power loss by minimizing skirt width and incorporating a shorter wrist pin, enhancing efficiency and weight savings. Depending on your application, the pistons feature an accumulator groove that helps reduce combustion pressure, decreasing ring flutter and improving sealing for consistent power output. The skirt coating further reduces friction and wear on piston skirts and cylinder walls while also decreasing operating noise, contributing to smoother engine operation.
Designed for specific engine configurations, these forged pistons provide an optimal balance of performance, durability, and efficiency. Whether you are building a race engine or upgrading for increased reliability, this piston kit offers the proven performance needed to push your Subaru Impreza to new limits. Made in the USA, these pistons meet the highest quality standards and are suitable for high-demand applications, ensuring your engine delivers consistent power and longevity.

Features:

• Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and shorter wrist pin

• Accumulator groove helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent power

• Skirt coating reduces friction and wear on piston skirts and cylinder walls while decreasing operating noise

• Forged in the USA using 2618 aluminum for high tensile strength required in performance engines

• Engineered specifically for Subaru EJ257 engines to optimize performance and durability

• Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings for reliable operation

Fitment:
Subaru Forester Sports 2.5 XT 2008
Subaru Impreza WRX 2002
Subaru Impreza WRX 2003
Subaru Impreza WRX 2004
Subaru Impreza WRX 2005
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
Subaru Legacy 2.5GT 2010
Subaru Legacy 2.5GT 2011