Carrillo SC7428-1 Piston & Ring Set 100.5mm 8.5:1 CR Subaru EJ257

The Carrillo SC7428-1 is a high-performance piston and ring set engineered specifically for 2004-2012 Subaru Impreza WRX STI models equipped with the EJ257 engine. This precision-engineered set features a 100.5mm bore diameter and delivers an 8.5:1 compression ratio, making it an ideal choice for forced induction applications and performance engine builds.

Key Specifications:

• 100.5mm bore diameter for precise fitment
• 8.5:1 compression ratio optimized for turbocharged applications
• Complete piston and ring set for single cylinder
• Manufactured by CP-Carrillo using premium forging processes
• Designed to withstand extreme cylinder pressures and high RPM operation

CP-Carrillo pistons are manufactured in Irvine, California using cutting-edge technology combined with traditional craftsmanship. Each piston undergoes rigorous quality control to ensure dimensional accuracy and durability in demanding performance applications. The included ring set is precision-matched to the piston for optimal sealing and reduced blow-by.

Application: Subaru Impreza WRX STI (2004-2012) with EJ257 2.5L turbocharged flat-four engine.