Eagle B16040MS040 Balanced Rotating Assembly Kit - Ford 429/460 Big Block

The Eagle B16040MS040 is a complete balanced rotating assembly designed for Ford 429/460 big block engines with .040" overbore. This street/strip assembly provides a reliable, cost-effective foundation for engine builds producing up to 500 horsepower.

Complete Assembly Includes:

• Eagle cast steel crankshaft with .092" fillet radiuses for increased strength
• Eagle SIR (Super I-Beam Rod) forged 5140 steel connecting rods with 3/8" ARP 8740 bolts
• Hypereutectic aluminum pistons designed for .040" overbore
• Premium piston rings with standard gap specifications
• Complete bearing set (rod and main bearings)
• Pioneer harmonic balancer and flexplate (externally balanced assemblies)

Key Features:

• Factory balanced assembly - ready to install with no additional balancing required
• Cast steel crankshaft provides excellent durability for street applications
• Forged I-beam connecting rods offer strength upgrade over OEM
• Shot-peened rod surfaces for improved fatigue resistance
• Compatible with both 1-piece and 2-piece rear seal applications

This assembly is ideal for street performance, mild street/strip applications, and pump gas naturally-aspirated builds. Eagle's precision manufacturing ensures proper component tolerances and reliable performance straight from the box.