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["Nissan RB Series","Nissan Skyline"]
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RB26 / RB30 CRANKSHAFTS 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.
Part #
Description #
Stroke
Crank Pin
Main
BC5235
CRANKSHAFT - Nissan RB26/RB25, 4340 Billet
73.7mm
48mm
55mm
BC5239
CRANKSHAFT - Nissan RB26/RB25, 4340 Billet
79mm
48mm
55mm
BC5230
CRANKSHAFT - Nissan RB30, 4340 Billet
90mm
49.96mm
54.95mm
BC5239LW
CRANKSHAFT - Lightweight Nissan RB26/RB25, 4340 Billet (12 lbs lighter)
79mm
48mm
55mm