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Eagle forged 4340 steel crankshaft features center counterweights, a non‑twist forging and .125" fillet radii to deliver high strength and stability in demanding Chevrolet big‑block applications. The crank is nitrided and micropolished for improved surface durability; the generous fillet radii mean chamfered or narrowed bearings are required. Built for high‑RPM, high‑power use in 4.625" stroke setups.
Eagle Chevrolet Big Block 4.625in Stroke 396 / 402 Crankshaft
