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This CP piston and ring set is specified for the Subaru EJ257 used in WRX STI applications, with a 99.75mm bore and +0.25mm oversize dimension and a 9.0:1 compression ratio. Supplied as a single piston and ring set, it provides the exact replacement sizing needed for engine rebuilds or repairs on EJ257 engines. The package is a straightforward choice when correct bore, oversize and compression are required.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (99.75mm) - Size (+0.25mm) - CR (9.0) - SINGLE
