Eagle Chevrolet 305/350/383 2pc Rear Seal 3.75in Stroke Forged 4140 Steel Crankshaft

If you're building a performance Chevrolet engine, this Eagle forged 4140 steel crankshaft is a solid foundation. It's designed for Chevy 305, 350, and 383 cubic inch V8s, offering a 3.75-inch stroke for increased displacement and power potential. This crankshaft is intended for competition use, meaning it's built to handle the demands of high-performance applications.

Eagle starts with a non-twist forging of 4140 steel, which is known for its strength and durability. They've incorporated .125-inch fillet radii at the journals. This design detail adds superior strength to the crankshaft, helping it resist stress under heavy loads. Because of these radiuses, you'll need to use chamfered or narrowed bearings to ensure proper clearance. The surface of the crankshaft is nitrided and then micropolished. Nitriding hardens the surface, improving wear resistance, while micropolishing creates a smooth finish for reduced friction and better oil flow, crucial for longevity in a performance engine.

This crankshaft features a 2-piece rear main seal design and is internally balanced, simplifying installation in many engine builds. It's a well-built component that forms the core of a powerful V8 engine.