CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (99.5mm) - Size (Standard) - CR (8.2)

The CP Piston & Ring Set for Subaru EJ257 WRX STi by CP Pistons is a high-performance engine component designed to enhance the durability and efficiency of your turbocharged Subaru engine. This set includes pistons and rings precisely engineered to match the bore size of 99.5mm, with a standard size and a compression ratio of 8.2. Constructed from premium materials, these pistons provide excellent heat resistance, strength, and longevity, making them ideal for high-performance applications. The design ensures optimal sealing and compression, contributing to improved power output and engine reliability under demanding conditions.

This piston and ring set is specifically designed for Subaru EJ257 engines found in WRX STi models. It is suitable for use in vehicles from the early 2000s onward, offering a direct replacement for stock components. Ideal for enthusiasts and racers, this kit supports both street and track use, providing a reliable upgrade for boosted engines. Installation involves standard bolt-on procedures, and the set includes all necessary rings and pistons for a complete rebuild or performance upgrade. Compatibility is limited to Subaru WRX STi models with the EJ257 engine, ensuring precise fitment and optimal performance.