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CP Pistons' piston and ring set is specified for Subaru EJ257 WRX STI engines with a 100.5mm bore and +0.25mm oversize. Offered as a complete set, it supplies the necessary pistons and rings sized for the specified bore and compression ratio details provided in the catalog. This replacement set is intended for engine rebuilds where exact bore and oversize sizing match the EJ257 specification.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100.5mm) - Size (+0.25mm) - CR (10) - Set
