Eagle Chevy 383 1pc Seal 4140 Forged Crankshaft

This is the Eagle 383 1-piece rear seal 4140 forged crankshaft, built for Chevrolet 305/350 based engines. It features a 3.750-inch stroke and is internally balanced, making it a solid choice for those looking to build a potent 383 cubic inch stroker engine. If you're assembling a performance engine for competition, this crankshaft is designed to handle the demands of racing and high-RPM use.

Eagle starts with a non-twist 4140 forged steel forging, which is known for its strength and durability under stress. To further enhance its robustness, the fillet radii are .125 inches, which requires the use of chamfered or narrowed bearings during installation. This design detail contributes to superior strength, especially in high-stress areas. The crankshaft also receives a nitrided surface treatment and a micropolished finish. Nitriding hardens the surface, improving wear resistance, while micropolishing ensures a smooth finish for optimal bearing performance and longevity.

This crankshaft is intended for competition use, meaning it's built with extra strength and durability in mind for applications that push the limits. When building a performance engine, using a well-built forged crankshaft like this one is crucial for reliability and achieving your power goals. Always refer to the manufacturer's installation instructions for specific bearing requirements and assembly procedures.