CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore 99.75mm - Size 0.25mm - CR 8.2

Manufacturer: CP Pistons

Article no.: SC7422-4

€1,029.35*

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

CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore 99.75mm - Size 0.25mm - CR 8.2

This CP Piston & Ring Set is engineered for the Subaru EJ257 engine found in WRX STi models, featuring a 99.75mm bore with a 0.25mm oversize and an 8.2 compression ratio. Crafted from high-strength forged aluminum, these pistons are CNC machined and balanced to within +/- 1 gram for optimal performance and durability. The set includes wrist pins and features accumulator grooves and double pin oilers force fed from the oil ring, ensuring superior lubrication and reliability under high-stress conditions.

High-strength forged aluminum construction
Super lightweight design for enhanced engine response
Fully CNC machined and balanced to +/- 1 gram
Includes wrist pins (OEM pin locks required)
Accumulator groove and double pin oilers for improved lubrication
Designed for oversized valves and high lift camshafts

These pistons provide excellent ring seal, reduced blow-by, and maintain peak horsepower throughout the life of the piston rings. Ideal for performance builds and motorsport applications for Subaru EJ257 engines.

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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