Eagle B627043800 Balanced 8-Cylinder Rotating Assembly with Forged 4140 Crank and 4340 I-Beam Rods

The Eagle B627043800 is a factory-balanced, complete rotating assembly engineered for 8-cylinder performance engine builds. Designed for street/strip and competition applications, this kit delivers a precision-matched combination of components ready to drop into your engine build with confidence.

This assembly centers around a 4.000" forged 4140 steel crankshaft featuring a 24-tooth reluctor wheel, paired with 6.125" forged 4340 steel I-Beam connecting rods secured with 7/16" ARP 8740 bolts. The forged 4032 DSS pistons provide excellent strength and thermal stability for demanding power levels. The "B" prefix in the part number confirms this assembly has been factory balanced by Eagle, eliminating the need for additional machine shop balancing.

Kit Includes:

• Forged 4140 steel crankshaft – 4.000" stroke with 24-tooth reluctor
• Forged 4340 steel I-Beam connecting rods – 6.125" length
• 7/16" ARP 8740 connecting rod bolts
• Forged 4032 DSS pistons
• Plasma-moly piston rings
• King or Clevite rod and main bearings

Key Features:

• Factory balanced assembly – no additional balancing required
• Forged 4140 crankshaft for superior strength over cast alternatives
• 4340 steel I-Beam rods rated for high-horsepower street and strip use
• ARP 8740 fasteners for reliable rod-to-cap clamping force
• Forged 4032 pistons for high-boost and high-RPM durability
• All components test-fitted at Eagle's facility before shipping

Eagle Specialty Products rotating assemblies are test-fitted in-house to ensure proper fitment and function. This complete kit simplifies the engine build process by providing a proven, pre-matched combination of crank, rods, pistons, rings, and bearings from a single trusted manufacturer.