Eagle Chevrolet Big Block LW Forged 4340 Crankshaft

This is an Eagle forged 4340 steel crankshaft specifically for Chevrolet Big Block engines, featuring a 4.250-inch stroke and designed for internal balance. If you're building a high-performance engine that needs to handle serious stress, a forged crankshaft like this is a critical component. It’s built to be much stronger than a cast crank, giving you the confidence to push your engine harder.

Eagle uses a non-twist forging process for this crankshaft, which helps maintain its straightness under extreme loads. The .125-inch fillet radii at the journals are chamfered, meaning you'll need to use chamfered or narrowed bearings to ensure proper clearance and oil flow. This design detail is important for preventing stress risers and improving overall durability. The crankshaft also receives a nitrided surface treatment and is micropolished. Nitriding hardens the surface, making it more resistant to wear and fatigue, while micropolishing ensures a smooth finish for reduced friction and better bearing life.

This crankshaft is intended for demanding applications where reliability and strength are paramount. It's a well-built piece designed to be the foundation of a powerful engine build.