CP Forged Piston Set, Subaru EJ257 WRX STi Bore:100 mm (+0.5 mm) immunity to transients according to

immunity to transients according to ISO 7637

285° Intake / 277° Exhaust   12

- ARP Custom Age 625+ Head Stud Kit**- Genuine BMW Head Gasket- CP x 5150 Pro-Xtreme Forged Piston Set    - Heavy Duty Piston Pins    - Optional: Add Skirt Coating or Dome Coating- CP-Carrillo x 5150 Pro-Xtreme Forged Connecting Rod Set- 5150 High Performance Main Bearing Set

Upgrade your BMW M40 / M42 engine with the ARP Head Stud Kit

Please note that this Head Stud Kit is not a retrofit from a Chrysler or Volvo stud kit

CP Forged Piston Set, Subaru EJ257 WRX STi Bore:100 mm (+0.5 mm) immunity to transients according toCP Carrillo is one of the most globally respected manufacturers of aftermarket pistons, known for their strict quality, durability, and range of performance applications. CP Pistons are designed to improve engine power and reliability by using high strength, lightweight materials and advanced engineering. Here are some of the features of CP Carrillo pistons: Lightweight design: CP Carrillo pistons are made from high strength, lightweight materials,