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This CP forged piston and ring set is built for Subaru EJ257 WRX/STI stroker applications with a 100.5mm bore at +1.0mm oversize and a 9.0:1 compression ratio. The kit supplies matched pistons and rings sized for stroked EJ257 builds, offering a ready solution for engines requiring that specific bore and oversize dimension during rebuild or performance machining.
CP Piston & Ring Set for Subaru EJ257 WRX/STI (Stroker)-Bore (100.5mm)-Size (+1.0mm)-CR (9.0)
