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CP Forged Pistons and Rings Subaru

CP Pistons

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Product Options

  • Subaru EJ20 2.0L CP Pistons Standard Size 92mm Bore 8.5 Compression

    SKU: SC7399

    Price: $653.00

  • Subaru EJ20 2.0L CP Pistons .5mm Oversize 92.5mm Bore 8.5 Compression

    SKU: SC7400

    Price: $653.00

  • Subaru EJ20 2.0L CP Pistons 1mm Oversize 93mm Bore 8.5 Compression

    SKU: SC7401

    Price: $653.00

  • Subaru EJ255 EJ257 2.5L CP Pistons Standard Size 99.5mm Bore 8.2 Compression

    SKU: SC7420

    Price: $653.00

  • Subaru EJ255 EJ257 2.5L CP Pistons .25mm Oversize 99.75mm Bore 8.2 Compression

    SKU: SC7422

    Price: $653.00

  • Subaru EJ20 2.0L CP Pistons .5mm Oversize 100mm Bore 8.2 Compression

    SKU: SC7421

    Price: $653.00

  • Subaru EJ255 EJ257 2.5L CP Pistons Standard Size 99.5mm Bore 9.0:1 Compression

    SKU: SC7425

    Price: $653.00

  • Subaru EJ255 EJ257 2.5L CP Pistons 25mm Oversize 99.75mm Bore 9.0:1 Compression

    SKU: SC7426

    Price: $653.00

Product Description

CP forged pistons for the WRX and STI 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 EJ257.

CP offers optional coatings to enhance the effectiveness of your pistons. The top coating is designed to reflect heat into the combustion chamber, thereby increasing exhaust gas velocity and greatly improving scavenging potential. The skirt coating offers additional lubricant in times of extreme heat or heavy wear situations. The coating is designed to reduce friction on the skirt by providing a buffer to the cylinder. Coating options are applied to the entire set and add 4-6 weeks to the order time.

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

CP Pistons do not include pin retaining locks; they require OEM pin locks.
CP Pistons are sold in sets of four (4) and include piston rings
CP Pistons are different between the EJ20 2.0L & EJ255 & EJ257 2.5L engines; choose accordingly below.

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