Eagle Chevy 4.8/5.3 LS 4.000in Crank 24 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 is specifically for Chevy 4.8L and 5.3L LS engines, giving you a strong starting point for serious performance builds. Getting the rotating assembly balanced from the factory saves you a significant amount of time and ensures the critical internal components work together smoothly.

This assembly features a forged 4140 crankshaft with a 4.000-inch stroke, which is a common upgrade for increasing displacement in LS engines. It's set up for a 24-tooth reluctor wheel, essential for proper engine management in many LS applications. The connecting rods are 6.125-inch long, made from strong 4340 I-beam material, and secured with 7/16-inch ARP 8740 bolts, known for their reliability under high stress. The pistons are forged 4032 DSS flat-tops with a -5cc dish, designed for a 3.800-inch bore, and come with plasma-moly file-fit rings, allowing for precise gap setting during installation. King XP rod and main bearings are included, offering excellent wear resistance and performance.

This is a complete, balanced rotating assembly, meaning the crankshaft, connecting rods, pistons, rings, and bearings have been precisely matched and balanced at Eagle's facility. This critical step helps reduce engine vibration and wear, especially at higher RPMs. Keep in mind that this assembly is not CARB approved and cannot be shipped to California. For optimal results, always refer to the manufacturer's installation instructions and ensure all related components are compatible with your specific build.