Eagle 20403070 8-Cylinder Engine Rotating Assembly Kit

The Eagle 20403070 is a complete rotating assembly designed for 8-cylinder engine builds. Eagle rotating assemblies are test-fitted in-house to ensure proper component compatibility, and include the crankshaft, connecting rods, pistons, bearings, and piston rings needed for a complete bottom-end build.

Complete Assembly Includes:

• Crankshaft with precision-ground journals
• Connecting rods with high-strength fasteners
• Pistons with pins and locks
• Piston rings matched to the application
• Rod and main bearings from premium manufacturers

Eagle assemblies typically feature forged 4340 center-counterweighted crankshafts (when available), forged H-Beam rods with ARP 2000 or L19 bolt upgrades, and purpose-built heavy-duty pistons. Most assemblies are available balanced or unbalanced, allowing you to choose professional balancing from your machine shop if preferred.

Externally balanced assemblies balanced by Eagle include a harmonic damper and flexplate or flywheel from Pioneer. This complete kit provides all the essential rotating components needed for building a reliable, high-performance 8-cylinder engine.