CP Piston & Ring Bore 99.5mm 8:2 CR WRX / STI Subaru Turbo EJ255 / EJ257 Models 2004-2021 STI_2015-2021 Increases Horsepower

Increases Horsepower

Part #: 22074

ARP moly lube ONLY

One roll will wrap one medium header

Increased exhaust velocity adds power

CP Piston & Ring Bore 99.5mm 8:2 CR WRX / STI Subaru Turbo EJ255 / EJ257 Models 2004-2021 STI_2015-2021 Increases HorsepowerPart #: SC7420 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