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This CP piston and ring package supplies a single replacement piston sized +1.0mm (100.5mm bore) with matched rings for Subaru EJ257 engines used in WRX STI applications. Specified with an 8.2:1 compression ratio, the set is intended for rebuilds or bore‑up repairs where precise piston sizing and ring compatibility are required. It offers a focused service part for EJ257 engine maintenance and rebuilds.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100.5mm) - Size (+1.0mm) - CR (8.2) - Single
