Eagle 629063905 Competition Rotating Assembly Forged Crank - 383ci 8-Cylinder 4340 LS1

The Eagle 629063905 is a Competition-grade 383ci rotating assembly engineered for high-performance 8-cylinder GM LS-series engines. Built around a 4.000" forged 4340 steel crankshaft with a 24-tooth reluctor ring, this kit delivers the strength and precision required for serious street, strip, and forced-induction applications.

Kit Specifications:

• Displacement: 383 cubic inches
• Bore: 3.905 in.
• Stroke: 4.000 in.
• Crankshaft: Forged 4340 steel, 24-tooth reluctor, 1-piece rear seal
• Connecting Rods: 6.125 in. H-Beam forged rods with 7/16" ARP 8740 bolts
• Pistons: Forged 4032 Mahle -6cc flat top
• Rings: Plasma-moly file-fit ring set
• Bearings: King XP rod and main bearings
• Balance: Unbalanced (requires balancing by a qualified machine shop prior to installation)

What's Included: Crankshaft, connecting rods, pistons, piston pins, piston rings, and rod/main bearings — everything needed to assemble a performance short block bottom end.

Eagle rotating assemblies are test-fitted in-house to ensure all components work together correctly. The competition-level forged components make this kit suitable for racing engines running exotic fuels, nitrous oxide, or forced induction. Professional engine assembly and machining is recommended. Verify reluctor ring tooth count, bore size, and cylinder head combustion chamber volume before ordering to ensure proper kit selection.

Manufacturer Part Number: 129123905 | Retailer SKU: 629063905