Eagle Chevy 4.8/5.3 LS 4.000in Crank 58 Tth Relctr 6.125in I-Beam 3.800in Pistons Balanced Assembly

If you're building a naturally-aspirated LS engine for racing, a balanced rotating assembly like this one from Eagle is a solid foundation. This assembly includes a 4.000-inch forged 4140 crankshaft, 6.125-inch 4340 I-beam connecting rods with 7/16-inch ARP 8740 bolts, and 3.800-inch forged 4032 DSS flat-top pistons with a -5cc dish. The 58-tooth reluctor wheel is standard for many LS applications.

This assembly comes balanced from the factory, saving you a significant step and ensuring smooth operation at higher RPMs. The pistons are designed for file-fit plasma-moly rings, allowing for precise gap setting during installation. King XP rod and main bearings are included, offering robust protection for your new rotating assembly. This setup is specifically intended for naturally-aspirated racing use, meaning it's built to handle the demands of consistent high-RPM operation without forced induction.

When assembling your engine, remember to follow the manufacturer's instructions for ring gap setting and bearing installation. This balanced rotating assembly is a critical component for any performance LS build where reliability and power are key.