Chevy BBC 454 Cast Steel Crankshaft ST-4.250 M-BBC RJ-2.2 RMS-2Pc Bal-Ext The right choice is critical

The right choice is critical for your engine and your wallet--choose Speedmaster iron distributor gears

Experience unparalleled performance and power with Speedmasters 6-71 Complete Supercharger Kitengineered for maximum horsepower and durability

they come in three different finishes and feature a billet aluminum oil fill cap

and include the sealing ring

and perform at a much higher rpm

Chevy BBC 454 Cast Steel Crankshaft ST-4.250 M-BBC RJ-2.2 RMS-2Pc Bal-Ext The right choice is criticalThese Speedmaster cast crankshafts are perfect for mildly built street engines or just to replace stock crankshafts that have seen better days. These Speedmaster crankshafts are precision ground and micro polished to exacting tolerances.