Vigilante Performance Engineering 4340 Forged Steel Crankshafts for the LS Series Chevrolet offer choices of stroke from 3.900 to 4.125 allowing for cubic inch displacements that begin at 374 and run up to 441 cubic inches, assuming a 3.905/4.125 bore. They include either a 24 or 58 tooth reluctor wheel, as required.