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This CP piston and ring set is specified for the Subaru EJ257 used in WRX STI applications: 99.5mm bore, standard size, compression ratio 9.0. Sold as individual pieces, the set provides the piston and matching rings for builders or engine rebuilds on EJ257 engines and is offered to match the bore and CR details listed for correct fit in supported Subaru applications.
CP Piston & Ring for Subaru EJ257 WRX STi - Bore (99.5mm) - Size (STD) - CR (9.0) - 1 ea piece
