Eagle 11013060 BBC Competition Rotating Assembly Kit 489 CID 4.310 Bore 4.250 Stroke

The Eagle 11013060 Competition Rotating Assembly Kit is engineered for high-performance Chevrolet Big Block 454 engines requiring maximum strength and reliability in demanding racing applications. This complete 489 cubic inch assembly delivers the ultimate balance of durability and performance for nitrous oxide, forced-induction, and exotic fuel applications.

Complete Assembly Includes:

• Forged 4340 steel crankshaft with 4.250-inch stroke for exceptional strength
• 6.385-inch H-beam connecting rods with 7/16-inch ARP 8740 bolts
• Premium forged 2618 aluminum MAHLE pistons with -43cc dome design
• 4.310-inch bore pistons for .060-inch overbore applications
• Plasma-moly file-fit piston rings for superior sealing
• King XP series rod and main bearings for maximum durability

Key Features:

• Designed for internal balance without heavy metal
• Competition-grade components suitable for up to 850 horsepower
• Forged 4340 steel crankshaft provides ultimate tensile strength
• H-beam rod construction offers superior strength-to-weight ratio
• 2-piece rear main seal configuration for 1965-1990 big block Chevy applications

Important Installation Notes: This assembly must be professionally balanced by a qualified machine shop before installation. Minor clearancing of engine block may be required. Perfect for competition engines including drag racing, circle track, and high-performance street/strip applications.