Eagle Chevrolet 400 Forged Crankshaft - 4.150in Stroke

Eagle is well-known for building strong rotating assemblies for performance engines. This forged 4340 steel crankshaft is a prime example, designed for serious builds where reliability is key. It features a 4.150-inch stroke, which is a common choice for increasing displacement in Chrysler 400 engines, giving you more power potential.

What sets this crank apart is its construction. It starts with a non-twist forging process, ensuring the steel's grain structure is optimized for strength. The .125-inch fillet radii are chamfered, meaning you'll need to use narrowed or chamfered bearings, but this design detail significantly boosts the crank's resistance to stress cracks. Furthermore, the surface is nitrided and then micropolished. Nitriding hardens the surface to resist wear and fatigue, while the micropolishing creates an incredibly smooth finish for reduced friction and improved oil flow, which is crucial for longevity under high RPMs and heavy loads.

This crankshaft is intended for demanding applications, so if you're building a high-performance street engine or a dedicated race motor, this piece is built to handle the stress. Make sure to use the appropriate narrowed bearings and refer to the manufacturer's installation instructions for proper setup and clearance checks.