Brian Crower - Nissan RB30 Crankshaft - 4340 Billet - 90mm Stroke (BC5230)

4340 billet. 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.