Eagle B13012030 Big Block Chevy Balanced Rotating Assembly - 454 Kit

The Eagle B13012030 is a complete balanced rotating assembly designed for Chevrolet Big Block 454 engines with a 2-piece rear main seal. This kit provides excellent performance and reliability for street and strip applications producing up to 500 horsepower.

Complete Kit Includes:

• Cast steel crankshaft with 3.750" stroke
• Eagle SIR I-beam connecting rods with 5.700" center-to-center length
• 3/8" ARP 8740 fasteners for superior clamping strength
• Forged 4032 aluminum pistons with -20cc inverted dome design
• Precision file-fit piston rings
• High-performance engine bearings

Key Features:

• Factory-balanced by Eagle for precise tolerances and immediate installation
• Designed for .030" overbore (4.155" bore diameter)
• Internal balance configuration eliminates need for external counterweights
• All components precision-matched and ready to install

This assembly delivers proven durability and performance at an affordable price point, backed by Eagle Specialty Products' reputation as a leading manufacturer of high-quality engine components. The "B" prefix in the part number confirms this kit is completely balanced and requires no additional machine shop balancing work.