Eagle 64638040 8-Cylinder Engine Rotating Assembly Kit

The Eagle 64638040 is a complete 8-cylinder engine rotating assembly designed for performance street and strip applications. Eagle Specialty Products is a trusted name in high-performance engine building, offering rotating assemblies that are test-fitted in-house to ensure proper fit and function before leaving the factory.

Eagle rotating assemblies combine a precision-matched crankshaft, connecting rods, pistons, rings, and bearings into a single kit — eliminating the guesswork of sourcing individual components and ensuring all parts work together as a system. Each assembly is built around quality components selected to maximize performance, reliability, and durability.

Key Features:

• Complete 8-cylinder rotating assembly kit for performance engine builds
• Includes crankshaft, connecting rods, pistons, rings, and bearings
• Test-fitted at Eagle's facility to verify proper component fitment
• Available balanced or unbalanced to suit your machine shop preference
• Externally balanced assemblies include harmonic damper and flexplate from Pioneer (where applicable)
• Rod and main bearings from King or Clevite included
• Rings suited to the intended application included
• Built to support street performance, street/strip, and competition use

Whether you're building a street cruiser or a dedicated strip machine, the Eagle 64638040 provides a reliable foundation for a high-performance 8-cylinder engine.