ATI crankshaft step keys are designed for reducing cranks with a 1/4 in. keyway to 3/16 in.

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MANLEY Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 3.875 in. Stroke, SBC 350, Each

MANLEY Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, 3.875 in. Stroke, SBC 350, Each

$1,882.98