CP Forged 99.75mm Bore / 9.0:1 Comp Pistons & Rings WRX / STI Subaru Turbo Models EJ255 / EJ257 2004-2021 vendor_AEM Electronics Big End Bore

Big End Bore

Material 88a Durometer

0L car to an STi shortblock

Wrapping headers and down pipes is an important first step in reducing unwanted and power-robbing under hood heat

CP Forged 99.75mm Bore / 9.0:1 Comp Pistons & Rings WRX / STI Subaru Turbo Models EJ255 / EJ257 2004-2021 vendor_AEM Electronics Big End BorePart #: SC7426 CP WRX and STI forged pistons feature superb ring seal, higher vacuum, lower blow by, greater durability and increased horsepower and torque through the power band. Better yet, peak horsepower is retained through the life of the piston rings. This is achieved by lightweight forgings and CP's exclusive machining techniques and processes. CP's commitment to racing is reflected in every piston they produce. CP is dedicated to superior