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4340 Forged Steel Crankshaft, Chev BB, 454 Main, 4.250"
4340 Forged Steel Crankshaft
Forged from 4340 alloy steel, featuring large 1/8" radii on all journals, lightening holes in rod throws, nitrided, shot peened, cross-drillled and have the oil holes radiused. Requires chamfered bearings.