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CP Pistons piston and ring set for Subaru EJ257 WRX STI applications, supplied as a set of four. These forged pistons are specified for a 100mm bore with +0.5 oversize and a listed compression ratio of 8.5, offering a direct replacement option when rebuilding or refreshing a four-cylinder EJ257 engine with the noted bore and size details.
CP Piston & Ring Set for Subaru EJ257 WRX STI- Bore (100mm) - Size (+0.5) - CR (8.5) - Set of 4
