Eagle B11421L100 Big Block Chevy 496 Competition Rotating Assembly Balanced

The Eagle B11421L100 is a factory-balanced competition rotating assembly designed to build a 496 cubic inch Big Block Chevy engine. This assembly is engineered to support engine builds up to 900 horsepower, making it ideal for serious street performance and racing applications.

Complete Assembly Includes:

• Eagle 4340 forged steel crankshaft with 4.250-inch stroke
• Eagle 6.385-inch H-beam connecting rods
• 4032 forged Icon dome pistons with +23cc dome
• High-performance piston rings
• Premium rod and main bearings

This rotating assembly is configured for Gen VI Big Block Chevy applications with 1-piece rear main seal and fits short deck 9.800-inch blocks. The "B" prefix indicates this assembly has been precision-balanced at the factory, eliminating the need for additional balancing before installation. The upgraded rod bolts make these kits rated to support 1200+ horsepower, providing exceptional strength and reliability for high-performance builds.

Compression ratios vary depending on combustion chamber size: 10.8:1 with 112cc chambers, 10.3:1 with 118cc chambers, or 9.8:1 with 124cc chambers. Perfect for stroker builds seeking maximum displacement and power from Big Block Chevy platforms.