JE Pistons SUB STI EJ257 Block w/ EJ20 Head 100mm Bore CR 8.5 KIT Set of 4 Pistons

Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applicationsDesigned specifically for each engine and use application to provide optimized performance durabilityProprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pinSkirt coating (depending on application) reduces friction and wear on piston skirts and cylinder walls while simultaneously reducing operating noiseAccumulator groove (depending on application) helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent powerIncludes high-quality wrist pins, locks, and JE Pro Seal premium piston ringsMade 100% in the USA

This Part Fits:

Year	Make	Model	Submodel
2006-2008	Subaru	Impreza	2.5i
2002-2004	Subaru	Impreza	Outback
2005-2008	Subaru	Impreza	Outback Sport
2002-2005	Subaru	Impreza	RS
2002-2004	Subaru	Impreza	TS
2002-2008	Subaru	Impreza	WRX
2006-2007	Subaru	Impreza	WRX Limited
2004-2008	Subaru	Impreza	WRX STI
2007	Subaru	Impreza	WRX STI Limited
2006-2007	Subaru	Impreza	WRX TR