CP Piston & Ring Set for Subaru EJ25 2.5RS - Bore (100mm) - Size (+0.5mm) - Compression Ratio (8.5)

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SKU SC7410

CP Pistons Subaru piston and ring kits are as good as they come. Founded to service the needs of those with the desire to build engines of the highest quality and technology, CP Pistons uses proprietary tooling, dedicated cutters, unique fixtures, and state-of-the-art equipment to produce superior pistons that won't compromise your expectations. Their climate-controlled inspection department is the most advanced in the industry—and is outfitted with computerized electronic equipment specifically designed for their needs. Each piston is engineered using sophisticated computer modeling for optimum designs, while their 5-axis machining capability enables them to create any piston for any application.


Some pistons are suitable for turbo, nitrous oxide, and supercharged engines

Available in standard or oversized

Deep valve relief depth accommodates high-lift camshaft

Made for +1mm valve sizes

Custom skirt cam and barrel design

Accumulator grooves

High-strength aluminum forgings

High performance rings

Can be compatible with oversize valves, higher lift cams, and high performance rings

Fully CNC-machined and balanced to +/-1 gram

Wrist pins included at no additional cost

Double pin oilers, force fed oil ring

Pick lock grooves for easy lock removal

Pin fitting included


2006 Saab 9-2X Aero, 2004-2006 Subaru Baja Turbo, 2008-2013 Forester, 2006-2007 WRX, 2008-2014 Subaru WRX/STI Hatchback and Sedan, 2005-2012 Legacy GT, 2005-2009 Subaru Outback, 2015 + STI

Actual Product May Vary from Image.

This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov