CP Piston & Ring Set Bore 99.5mm Size STD Compression Ratio 9.0 WRX / STI Subaru EJ257 2004-2021 GR86_2022-2023 Reduction of oil splashing and

Reduction of oil splashing and beating off crank & connection rods will also lower oil temperatures

transmission mount

Linear friction profile for smooth

but can be modified to work with the OEM pickup

CP Piston & Ring Set Bore 99.5mm Size STD Compression Ratio 9.0 WRX / STI Subaru EJ257 2004-2021 GR86_2022-2023 Reduction of oil splashing andPart #: SC7425 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