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CP piston and ring set for Subaru EJ257 WRX STI engines, bore 100.5mm, oversize +1.0mm, compression ratio 8.5:1; set of four. This matched piston and ring kit is intended for engine rebuilds or repairs requiring the specified oversize components, restoring proper fit and combustion sealing in EJ257 applications. It provides the core components needed to service the engine’s compression and piston assembly.
CP Piston & Ring Set for Subaru EJ257 WRX STI - Bore (100.5mm) - Size (+1.0mm) - CR (8.5) - Set
