Eagle Chevrolet BB 4.500in Stroke Int Balance Center Counterweighted Forged 4340 Steel Crankshaft

When you're building a high-performance Chevrolet big block engine that needs to handle serious power and high RPMs, the crankshaft is the heart of the operation. This Eagle forged 4340 steel crankshaft is built for those demanding applications, offering a 4.500-inch stroke for increased displacement and power potential. It's designed for internal balance and features center counterweights, which are crucial for maintaining stability and reducing vibration when the engine is spinning fast.

Crafted from a non-twist forging of 4340 steel, this crankshaft is inherently strong. The center counterweights are a key feature, helping to offset the rotating mass more effectively than traditional designs, especially in high-power builds. Eagle also treats this crank with a nitride surface treatment and micropolishing, which hardens the surface for improved wear resistance and creates a smooth finish on the journals. You'll need to use chamfered or narrowed bearings because this crankshaft has 1.250-inch fillet radii, which are larger for added strength at the journal transitions.

This crankshaft is intended for builders who are pushing the limits of their Chevrolet big block engines. It's a well-built foundation for a powerful street machine or a dedicated race engine. Remember to consult your engine builder or the manufacturer's instructions for specific assembly details, especially regarding bearing selection and balancing procedures for your complete rotating assembly.