Callies SBC 4340 Forged Magnum Crank - 3.750 Stroke

Magnum 4340 Forged Steel Crankshaft

Lightweight, durable crankshafts are made from ultra pure AISI 4340 forged steel. Crankshafts feature gun-drilled mains, fully profiled counter-weights, and have undergone exclusive Ultra-Case heat treatment. These crankshafts are available for a variety of small block and big block Chevy engines.

Crankshaft - Magnum - 3.750 in Stroke - Internal Balance - Forged Steel - 2 Piece Seal - Small Block Chevy - Each - MPN: SAJ21A-MG