BC Brian Crower Crankshaft for 4B11T Mitsubishi Evo X (BC5139)

The Brian Crower crankshaft is made from 4340 billet. Each crankshaft undergoes stress relief, shot peening, magna flux inspection, and nitriding (a multi-step heat treatment) to ensure peak performance. Fully profiled counterweights are designed to minimize windage through the crankcase, reducing oil resistance for improved RPM potential.

Vehicle Fitment:
2008-2015 Mitsubishi Lancer Evolution X
(4B11T CZ4A Evo X GSR and MR models)

Purchase Includes:
(1) 98mm Stroke Crankshaft

Notes:
Images are for reference

More Info:
BC crankshafts are made from the finest, aerospace grade 4340 steel billet material. CNC machined on state of the art, 5 axis Mazak Integrex 300-IV CNC machines to exacting tolerances (.0001"). Every crankshaft features large radius journals that add rigidity for high horsepower, high boost, high rpm applications. Gun drilled, CNC ground oil holes feature a smooth surface for extra oiling, tear dropped for added oil scoop, cross drilled for priority main feeding to the rods and micro polished to a mirror finish for optimum bearing lubricity. All cranks are stress relieved, shot peened, magna flux inspected and nitrided (multi step heat treatment) for ultimate performance. Fully profiled counterweights are designed for reduced windage through the crankcase creating less oil resistance for better rpm potential.

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