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CP Piston & Ring Set for Subaru EJ257 WRX STi

Designed for high-performance applications, this piston set is engineered to withstand the intense heat and pressures of turbocharged or supercharged engines. It features a 100mm bore and an 8.2:1 compression ratio, making it ideal for race gas, alcohol, or E85 fuels.

  • Forged aluminum construction for durability
  • Dish-style pistons with four valve reliefs
  • Stroke: 79mm, Rod Length: 130.5mm
  • Suitable for supercharged or turbocharged racing 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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