Eagle Chevrolet BB 4.000in Stroke Internal Balance Forged 4140 Steel Crankshaft

Eagle forged 4140 steel crankshafts are designed for high-performance applications. They feature non-twist forging, a multi-stage heat-treatment, stress-relieving, and shot-peening. Each crankshaft undergoes X-ray, magnaflux, and sonic testing. Key features include chamfered oil holes for improved oiling and a .125 inch radius on rod and main journals for increased strength (requiring chamfered bearings). All journals are precision-ground and micro-polished to less than 5 R.A. A target bob weight of +/- 2 percent significantly reduces balancing time. Rated to support up to 1000 horsepower.