Eagle · New
Eagle Chevrolet BB 1Pc Rear Seal 4.250in Stroke Internal Balance Forged 4340 Steel Crankshaft
MPN 445642546385 · Store SKU eag445642546385
Supplier stock checked 11/7/2026, 10:14:21 AM UTC. Adding a part does not reserve it.
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Product details
Eagle forged 4340 steel Cranks feature a non-twist forging, .125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface and micropolished. Intended for the most demanding applications. Forged 4340 Steel Crank - Chevrolet 454, 1PC REAR SEAL, 4.250" Stroke, INTERNAL BALANCE. 4340 CRANK CHEVY BB 4340 1 PC 4.250" STR
Manufacturer fitment & guides
- CHEVY BB
- Manufacturer-supplied application summary from Turn14; this may not be an exhaustive fitment list.
Part-specific notes
- California Proposition 65: Y