Eagle Chrysler RB 8 Bolt Flange Forged Crankshaft

This is an Eagle forged 4340 steel crankshaft specifically for Chrysler Big Block (RB) engines. It features an 8-bolt rear flange, a 4.375-inch stroke, and 2.200-inch rod journals. This crankshaft is built from a non-twist forging of 4340 steel, a strong material known for its durability under stress. The .125-inch fillet radii are chamfered, which means you'll need to use chamfered or narrowed bearings to ensure proper fit and function. This design detail is crucial for maintaining the crankshaft's integrity under high loads.

The surface of this crankshaft is nitrided and then micropolished. Nitriding is a heat-treating process that hardens the surface, making it more resistant to wear and fatigue. Micropolishing further refines the surface finish, which is essential for reducing friction and ensuring the longevity of both the crankshaft and the bearings it runs on. These features combine to make this crankshaft a solid option for builds that demand robust performance and reliability.

When installing this crankshaft, remember that the chamfered fillets require specific bearing types. Always refer to the manufacturer's installation instructions for detailed guidance on bearing selection and proper assembly procedures to ensure optimal performance and durability for your engine build.