CP Piston & Ring Set for Subaru EJ257 WRX STI - Bore 100.5mm +1.0mm Size - CR 8.2 - Set of 4

Manufacturer: CP Pistons

Article no.: SC7423-4

€1,029.35*

Available at supplier, delivery time: 7-10 working days

CP Piston & Ring Set for Subaru EJ257 WRX STI - Bore 100.5mm +1.0mm Size - CR 8.2 - Set of 4

This high-performance CP Piston & Ring Set is engineered specifically for the Subaru EJ257 engine found in the WRX STI models from 2004 to 2012. Featuring a bore size of 100.5mm with an oversized +1.0mm dimension and a compression ratio of 8.2:1, these forged pistons are designed to handle increased boost and horsepower demands while maintaining reliability and durability.

Manufactured from high-strength 2618 forged aluminum alloy, each piston is fully CNC machined and balanced to within +/- 1 gram for optimal engine balance and performance. The set includes high-performance rings and wrist pins, with deep and larger valve reliefs to accommodate oversized valves and high lift camshafts. The design also incorporates custom skirt cam and barrel profiles, accumulator grooves, and double pin oilers for enhanced lubrication and longevity.

Bore size: 100.5mm with +1.0mm oversize
Compression ratio: 8.2:1
Forged 2618 aluminum construction
Fully CNC machined and balanced
Deep valve reliefs for high lift cams and oversized valves
Includes high-performance piston rings and wrist pins
Double pin oilers and pin lock grooves for durability
Designed for Subaru EJ257 engine in WRX STI models (2004-2012)

Make	Model	Year	Type
Subaru	Impreza	2004	WRX STI
Subaru	Impreza	2005	WRX STI
Subaru	Impreza	2006	WRX STI
Subaru	Impreza	2007	WRX STI
Subaru	Impreza	2007	WRX STI Limited
Subaru	Impreza	2008	WRX STI
Subaru	Impreza	2009	WRX STI
Subaru	Impreza	2010	WRX STI
Subaru	Impreza	2010	WRX STI Special Edition
Subaru	Impreza	2011	WRX STI
Subaru	Impreza	2011	WRX STI Limited
Subaru	Impreza	2012	WRX STI
Subaru	Impreza	2012	WRX STI Limited

CP Pistons manufactures performance pistons for the Sport Compact and Domestic markets. Their manufacturing plant encompasses 32,000 square feet of CNC equipment and a climate controlled inspection department ensuring accurate and consistent quality. All pistons are made in CP’s Irvine based facility from USA made materials and are engineered for maximum power. With over 500 shelf parts available, their wide product range covers the most popular engines. Custom sizes are also available, for both sport compact and domestic vehicles.

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