Eagle B12001000 Balanced Competition 8-Cylinder Engine Rotating Assembly Kit

The Eagle B12001000 is a pre-balanced competition rotating assembly designed for 8-cylinder engines. Built by Eagle Specialty Products — the largest aftermarket connecting rod manufacturer in the world — this kit delivers the high-strength internal components needed for demanding street, strip, and racing applications.

Key Features:

• Factory pre-balanced assembly — the "B" prefix designation confirms this kit is precision-balanced by Eagle using Hines computerized balancers, requiring no additional machine shop balancing
• Engineered for 8-cylinder applications with matched components selected to maximize performance, reliability, and durability
• Forged 4340 steel crankshaft for superior strength over cast alternatives
• H-Beam connecting rods with premium ARP rod bolts for high-load capability
• Forged pistons paired with precision piston rings for consistent sealing and long service life
• High-performance rod and main bearings from leading suppliers such as Clevite or King
• All components are test-fitted in-house to ensure proper clearances and fitment before shipping

Eagle competition rotating assemblies are engineered to support high-horsepower builds at an affordable price point. A compatible harmonic balancer/damper and flexplate or flywheel are required and sold separately to match Eagle's balancing specifications.