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Eagle forged 4340 steel crankshaft for Chevrolet 409 engines, 4.000" stroke. Built with a non-twist forging and .125" fillet radiuses for enhanced strength, this crank requires chamfered or narrowed bearings. The nitrided surface and micropolished journals reduce wear and improve durability. It’s specified for demanding, high-power use where a strong forged crankshaft is essential.
Eagle Chevrolet 409 4.000in Stroke Forged 4340 Steel Crankshaft
