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The CP piston and ring set is specified for Subaru EJ257 WRX STi applications with a 100.0 mm bore and 0.5 mm oversize. This single-piston listing references an 8.2:1 compression ratio and is supplied to match EJ257 dimensions for rebuilds or engine assemblies requiring the stated bore and sizing. Sold per single piston and ring set to match the listed specification.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100mm) - Size (0.5mm) - CR (8.2) - SINGLE
