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The Eagle forged 4140 steel crank for Chevrolet LS is a 4.000" stroke crankshaft that includes a 58-tooth reluctor and is intended for competition use. Its non-twist forging, .125" fillet radiuses, nitrided surface and micropolished finish improve strength and surface quality. Installation requires chamfered or narrowed bearings; the design favors high-load applications where durability matters.
Eagle Chevy LS1 58 Tooth Reluctor 4140 Forged Crankshaft
