Eagle Subaru EJ20/EJ25 83mm Stroke 4340 Billet Crankshaft

This listing is for an Eagle 4340 Billet Steel Crankshaft designed for Subaru EJ20 and EJ25 engines. It features an 83mm stroke and dual thrust location, making it a solid foundation for a performance build. The billet 4340 steel construction offers significant strength improvements over stock components, crucial for handling increased power and stress.

Eagle starts with a solid block of 4340 steel and machines it into this crankshaft. To further enhance its durability, it undergoes a nitriding surface treatment, which hardens the exterior to resist wear. The journals are then micropolished to a smooth finish, which is important for proper bearing life and oil circulation. This crankshaft also features .125" fillet radii, which are designed to add strength to the main journals. Because of these larger fillet radii, you will need to use chamfered or narrowed main bearings when installing this crankshaft.

This crankshaft is a significant upgrade for anyone rebuilding or modifying their Subaru EJ20 or EJ25 engine. Its robust construction and advanced treatments are intended to support higher performance levels and provide long-term reliability under demanding conditions. Ensure you have the correct chamfered or narrowed main bearings on hand before beginning installation to accommodate the crankshaft's design.