Eagle - Chevy 409 4340 Forged Crank - 4.000 Stroke

The Eagle Chevy 409 4340 Forged Crankshaft features a 4.000-inch stroke and is precision-engineered for internal balance. Crafted from 4340 forged steel with non-twist forging and multi-stage heat treatment, this crankshaft is designed for durability and performance. It's perfect for GM W-Series engines, offering high strength and resistance to wear, thanks to its nitrided surface and micropolished journals. This crankshaft requires chamfered or narrowed bearings due to its .125-inch radius improvements, enhancing strength and rigidity.