CP Piston & Ring 100mm Bore 8:2 CR WRX / STI Subaru Turbo EJ255 / EJ257 Models 2004-2021 120 The hub is double sprung

The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability

ACT's 6-pad rigid race discs are made with high quality

The Kit Includes:

direct replacement or upgrade to the standard

CP Piston & Ring 100mm Bore 8:2 CR WRX / STI Subaru Turbo EJ255 / EJ257 Models 2004-2021 120 The hub is double sprungPart #: SC7421 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