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The Brian Crower EJ257 STI stroker kit is a complete rotating assembly upgrade for Subaru EJ257 engines, featuring an 83mm billet crank, I‑beam Extreme connecting rods and custom 5.141-inch pistons. Packaged to create a stroker displacement upgrade, the kit gives engine builders the core forged components needed to increase capacity while retaining compatibility with EJ257 architecture.
Brian Crower Subaru EJ257 STI Stroker Kit 83mm Billet Crank I-Beam Extreme Rods 5.141in Cust Pistons
