Eagle 12260040 Competition Rotating Assembly Kit - Chevy 400 409 CID

The Eagle 12260040 is a high-performance competition rotating assembly engineered for Chevrolet 400 small block engines with 350 main journals, delivering 409 cubic inches of displacement. This unbalanced kit is designed for serious racing applications including nitrous oxide and forced induction use.

Complete Assembly Includes:

• Forged 4340 steel crankshaft with 3.750-inch stroke for exceptional strength and durability
• Forged H-beam connecting rods with 5.700-inch center-to-center length
• 7/16-inch ARP 8740 chrome-moly rod bolts for superior clamping force
• Forged 4032 aluminum ICON pistons with -23cc inverted dome design and 4.165-inch bore diameter
• Plasma-moly file-fit piston rings for optimal sealing and reduced friction
• King XP series performance rod and main bearings

This Competition series assembly features premium forged components throughout, providing the strength and reliability demanded by high-horsepower racing engines. The inverted dome piston design allows for optimized compression ratios in various cylinder head combinations. As an unbalanced assembly, professional balancing by a qualified machine shop is required before installation.