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CP Piston and ring set for the Subaru EJ257 (WRX STI) is an oversize replacement set specified for a 100.50 mm bore at +0.5 mm and a 9.0:1 compression ratio. Supplied as a set of four, this kit restores correct bore sizing and sealing for engines requiring the specified oversize service dimension and includes rings matched to the piston geometry.
CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100.5mm) - Size (+0.5mm) - CR (9.0) Set of 4
