CP Forged Pistons

CP WRX & 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 engineering, utilizing the latest forging techniques and CNC machinery and backing it up with rigorous quality control makes for a top-notch product every time that emphasizes performance and reliability. CP has some of the highest quality control standards in the industry. CP is a division of Pankl Racing Systems, a high-technology racing group supplying engine and suspension components to numerous Formula One, F3000, IRL, CART, World Rally Racing teams and to such elite companies as Ferrari and Porsche. You will not find a finer piston for your EJ20 or EJ25. 

Piston Features:

• High-strength aluminium forgings
• Super lightweight design
• Fully CNC machined and balanced to +/- 1 gram
• Accumulator groove included
• Double pin oilers, force fed from oil ring
• Includes Wrist Pins

Fitment:

• Subaru STI 2004-2014 and WRX 2006-2014
• Subaru WRX 2002-2005

Notes

• Pin retaining locks are NOT included; the pistons require OEM pin locks.
• Sold as a set of four (4) pistons; piston rings are included.
• CP Pistons are different between the EJ20 2.0L & EJ255 & EJ257 2.5L engines; choose accordingly.