CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (99.5mm) - Size (Standard) - CR (8.2)

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 EJ257.

CP PISTON FEATURES:

• High-strength aluminum forgings
• Super lightweight design
• Fully CNC machined and balanced to +/- 1 gram
• Include wrist pins
• Accumulator groove included
• Double pin oilers, force fed from oil ring