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CP Piston and ring set for Subaru EJ257 WRX STI is sized to a 100.0mm bore with +0.5mm oversize and a 9.0:1 compression ratio. This matched piston-and-ring package is intended for engine rebuilds or bore-up jobs on EJ257 engines where the specified bore, oversize, and compression ratio are required for correct assembly and operation.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100.0mm) - Size (+0.5mm) - CR (9.0)
