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The CP Pistons 5100 Series chamfered single wrist pin is a direct replacement piston pin intended to secure the piston to the connecting rod. It is specified for use with CP part SC7421 on Subaru EJ257 WRX and STi applications. This single, chamfered pin suits engine rebuilds where OEM-style fit and proper piston-to-rod connection are required.
CP 5100 Series Chamfered Single Wrist Pin (use w/ SC7421 Subaru EJ257 WRX STi)
