Eagle Chevy BB 1Pc Rear Seal 4.500in Stroke Int Balance Center Counterweight Forged Steel Crankshaft

Forged from 4340 steel, this Eagle crankshaft is built for serious performance in Chevy Big Block engines. It features a 4.500-inch stroke and is designed for internal balance with center counterweights. This configuration helps keep the crankshaft stable and running smoothly even at high RPMs and under high-power conditions, making it a solid choice for demanding builds.

The crankshaft's non-twist forging and nitrided, micropolished surface treatment contribute to its overall strength and durability. Eagle specifies 125-inch fillet radii for superior strength, which means you'll need chamfered or narrowed bearings for installation. This attention to detail in material selection and design ensures this crankshaft can handle the stress of powerful engine builds.

This is a one-piece rear main seal crankshaft, intended for internal balance applications. If you're building a high-performance Chevy BB engine and need a crankshaft that can withstand significant power and high RPMs, this Eagle forged steel unit is a well-built option.