The Manley Turbo Tuff Billet 4340 Crankshaft for 2002-2017 Subaru Impreza WRX and STI with 79mm Stroke is the perfect crank to build a stout 2.2L/2.5L EJ bottom end. Each crankshaft is put through a mult-step heat treatment process and nitrided for maximum strength. The crankshaft is then stress relieved, shot peened, and magnafluxed. The center, crank pin and counterweights are gun drilled for reduced weight. Each crankshaft features knife-edged counterweights for proper balance and lowest rotational mass. Reducing the engine rotational weight of your WRX/STI to will not only increase engine response and horsepower but also improve turbo spool-up.

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