Eagle Chevrolet LS 4340 3.900in Stroke 58 Tooth Reluctor Forged Crankshaft

If you're building a high-performance Chevrolet LS engine, this Eagle forged 4340 steel crankshaft is a solid foundation. It's designed with a 3.900-inch stroke, which is a common choice for increasing displacement and power in LS applications. This crankshaft also comes equipped with a 58-tooth reluctor wheel, essential for proper engine management system communication on most LS variants.

Eagle starts with a non-twist forging of 4340 steel, a material known for its strength and durability under high stress. To further enhance its robustness, the fillet radii are .125 inches, which are chamfered or narrowed to work with specific bearings. This design detail is crucial for handling the increased loads in demanding builds. The crankshaft also receives a nitrided surface treatment and micropolishing, which hardens the surface to resist wear and improve bearing life, ensuring it can handle the rigors of serious performance use.

This crankshaft is intended for those building engines for the most demanding applications, where reliability and strength are paramount. It's a key component for anyone looking to push the limits of their LS engine performance. Ensure you use the appropriate chamfered or narrowed bearings as recommended for the .125" fillet radii.