Eagle Chevrolet 400 3.800in Stroke Internal Balance Forged 4340 Steel Crankshaft

This is an Eagle forged 4340 steel crankshaft, specifically designed for the Chevrolet 400 engine. It features a 3.800-inch stroke and is configured for internal balance, making it a solid choice for serious engine builds where reliability and strength are paramount. The non-twist forging process ensures that the crankshaft maintains its integrity under high stress, a critical factor when you're pushing an engine to its limits.

Eagle uses 4340 steel for these cranks, a material known for its exceptional strength and durability, which is essential for handling the increased forces in a performance or heavy-duty application. The fillet radii are .125 inches, which are chamfered or narrowed to accommodate specific bearing types, contributing to overall structural integrity. Furthermore, the crankshaft receives a nitrided surface treatment and is micropolished. Nitriding hardens the surface, increasing wear resistance, while micropolishing ensures a smooth finish for reduced friction and improved bearing life.

When installing this crankshaft, remember that the .125-inch fillet radii require chamfered or narrowed bearings. It's always best to consult the manufacturer's detailed installation instructions to ensure proper fitment and assembly, especially when dealing with performance engine components. This crankshaft is built for demanding applications where a stock component simply won't hold up.