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Eagle forged 4340 steel crankshaft for Chevrolet 454 engines, 4.250" stroke, internal balance with a 1‑piece rear seal. The crank features a non-twist forging and .125" fillet radiuses for strength and requires chamfered or narrowed bearings. Nitrided surface treatment and micropolished journals improve longevity. Suited for demanding, high-load engine applications where a sealed rear end is preferred.
Eagle Chevrolet BB 1Pc Rear Seal 4.250in Stroke Internal Balance Forged 4340 Steel Crankshaft
