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CP Pistons piston and ring set for the Subaru EJ257 used in WRX STI applications is supplied as a set of four pistons sized to 99.75mm bore with a +0.25mm oversize and a nominal compression ratio listing of 9.0. This matched piston and ring set is intended for engine rebuilds or overbore repairs where correct sizing and ring fit are required to restore reliable combustion chamber sealing.
CP Piston & Ring Set for Subaru EJ257 WRX STI- Bore (99.75mm)-Size (+0.25mm)- CR (9.0) - Set of 4
