Eagle 137753820 LS Competition Rotating Assembly 3.800" Bore 363ci 8-Cylinder

The Eagle 137753820 is a high-performance Competition rotating assembly designed for GM LS 4.8L and 5.3L engines. This kit features a 3.800" bore with forged 4340 steel crankshaft, 6.125" H-beam rods with 7/16" ARP 8740 bolts, and forged DSS -5cc flat top pistons, creating a displacement of approximately 363 cubic inches with the 4.000" stroke.

Key Components:

• Forged 4340 steel crankshaft with 4.000" stroke
• Forged 4340 H-beam connecting rods, 6.125" center-to-center length
• 7/16" ARP 8740 rod bolts for maximum strength
• Forged DSS pistons with -5cc flat top design
• Plasma moly cast iron ring set
• High-performance rod and main bearings (Clevite or King)
• Available with 24 or 58-tooth reluctor wheel

Performance & Applications:

Eagle LS Competition Rotating Assemblies offer ultimate performance, reliability and strength for engines producing up to 750 horsepower. These all-forged competition kits are designed to support engine builds up to 1000 horsepower, with upgrades allowing the rotating assembly to surpass 1200+ horsepower ratings, and will support power adders such as nitrous, turbos and blowers.

This assembly is designed for full internal balance. Part numbers that do not begin with "B" are unbalanced assemblies and must be balanced by a qualified machine shop before use. Eagle rotating assemblies are test-fitted in house to ensure everything works well together.

Fits: GM Gen III 4.8L (LR4), Gen IV 4.8L (LY2, L20), Gen III 5.3L Vortec 5300 (LM7, L59, LM4), Gen IV 5.3L (LMF, LH6, LY5, LMG, LC9, LH8, LH9). Customer is responsible for correct reluctor wheel verification.