Eagle's forged 4140 steel cranks are recommended for use up to 1000 hp. Eagle is well known for their high quality crankshafts and connecting rods. Eagle H beam rods and SIR I beam connecting rods, crankshafts and rotating assemblies have proven to be dependable performance products. Eagle connecting rods, both H beam and I beam styles, rotating assemblies and crankshafts are found in everything from serious street cars, to hot street strip cars, to all out drag and track racing engines.