Eagle Chevrolet 305/350 2pc Rear Seal 3.75in Stroke Forged 4340 Steel Crankshaft

If you're building a high-performance Chevrolet 305 or 350 engine, this Eagle forged 4340 steel crankshaft is a solid foundation. It's designed with a 3.75-inch stroke, which is a common choice for increasing displacement and power in these popular V8s. This crankshaft is specifically made for engines using a 2-piece rear main seal, a design found in many classic Chevy applications.

Eagle starts with a non-twist forging of 4340 steel, a material known for its strength and durability, making it well-suited for engines that will see hard use. The fillet radii are .125 inches, which means you'll need to use chamfered or narrowed bearings to ensure proper clearance and oil flow. This attention to detail in the design helps maintain superior strength throughout the crankshaft. To further enhance its resilience, the surface is nitrided and then micropolished. This process hardens the surface, making it more resistant to wear and fatigue, which is crucial for a component that experiences constant stress and rotation.

This crankshaft is internally balanced, simplifying the balancing process for your rotating assembly. It's intended for builds where durability and performance are top priorities. When you're aiming for a serious engine build, starting with a well-built crankshaft like this Eagle unit sets you up for success.