4.000" Stroke Rotating Assembly w/ I-Beam Rods

The Scat LS 5.3 363 Rotating Assembly is a comprehensive kit engineered for GM Gen III and Gen IV 5300 LS 5.3L engines, offering a significant upgrade for performance enthusiasts. This assembly is built around a robust Scat 4340 forged steel crankshaft with a 4.000-inch stroke and Scat Pro Series I-beam connecting rods measuring 6.125 inches, complete with 7/16" cap screws. The kit provides two distinct compression ratio options: 11.2:1 with 64.5cc cylinder head volume or 10.8:1 with 70cc cylinder head volume. A 24-tooth reluctor wheel is included for compatibility with specific LS engine management systems. It is important to note that this rotating assembly is supplied unbalanced and requires professional balancing prior to installation to ensure optimal performance and longevity. This rotating assembly is designed to fit GEN III 4.8L LR4, GEN IV 4.8L LY2 L20, GEN III 5.3L Vortec 5300 (LM7, L59, LM4), and GEN IV 5.3L (LMF, LH6, LY5, LMG, LC9, LH8, LH9) engines. Customers are responsible for verifying the correct reluctor wheel for their specific application.