Eagle Mitsubishi 4B11T 4340 Billet Crankshaft

This is the Eagle 4340 Billet Crankshaft, specifically made for the Mitsubishi 4B11T engine. If you're building a high-performance engine that needs to handle serious power, a strong crankshaft is the foundation you need. This billet 4340 steel crankshaft is designed to be the heart of a robust engine build, offering a significant upgrade over stock components for demanding applications.

Eagle starts with a solid billet of 4340 steel, a well-known material for its strength and reliability in high-stress environments. They then machine it to a 3.701-inch stroke, giving you more displacement for increased power potential. A key feature is the knife-edged counterweights; these are carefully shaped to reduce rotating weight. Less rotating mass means the engine can rev more freely and respond quicker to throttle inputs. To further enhance its strength and durability, this crankshaft receives a nitrided surface treatment and a micropolished finish. Nitriding hardens the surface, making it more resistant to wear and fatigue, while the micropolish ensures smooth operation and optimal oil flow.

Because of the .125-inch fillet radii, which are designed for superior strength, you will need to use chamfered or narrowed bearings with this crankshaft. This is a common requirement when stepping up to a performance crankshaft like this one. If you're pushing the limits of your 4B11T engine, this Eagle crankshaft is built to withstand the pressure.