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

The CP Piston & Ring Set for Subaru EJ257 WRX STi is a high-performance engine component designed to enhance the durability and efficiency of your turbocharged Subaru. Manufactured by CP Pistons, this set includes four pistons and rings built with precision to match the specifications of the EJ257 engine. Featuring a bore diameter of 100.5mm, a size increase of +1.0mm, and a compression ratio of 8.2, these components are engineered for optimal power output and reliability. The pistons are crafted from high-quality materials to withstand the stresses of high-performance driving, making them suitable for both street and track applications. This set provides a reliable upgrade for enthusiasts seeking improved engine performance and longevity.

Designed specifically for the Subaru EJ257 engine found in WRX STi models, this piston and ring set is compatible with vehicles from the early 2000s onward. It is intended as a direct replacement or upgrade for stock components, ensuring a straightforward installation process. The set is ideal for performance tuning, rebuilds, or engine refresh projects aimed at boosting horsepower and torque. Suitable for use in street, track, or competitive environments, these pistons and rings deliver consistent performance and durability under demanding conditions. Proper fitment and installation are recommended to maximize the benefits of this high-quality performance upgrade.