Eagle Chevy 396 4.000in Crank 6.135in I-Beam Rods 4.125in Pistons 168 Tooth FP Balanced Assembly

The Eagle B182154125 is a complete balanced street and strip rotating assembly designed to increase the displacement of Chevrolet big block 396/402 Mark IV engines to 428 cubic inches. This high-performance kit is engineered for enthusiasts targeting up to 500 horsepower and is compatible with pump gas. The assembly includes a 4.000-inch cast steel crankshaft with improved fillet radiuses, 6.135-inch I-beam connecting rods with 7/16-inch ARP 8740 rod bolts, forged 4032 aluminum Icon pistons with 17cc open chamber domes (4.125-inch bore), performance plasma-moly piston rings, and King SI series rod and main bearings. It comes factory balanced for easy installation, eliminating the need for additional machine shop work, and is specifically designed for 2-piece rear main seal applications.