Eagle B42106030 Street and Strip Balanced Rotating Assembly - Big Block Chevy

The Eagle B42106030 is a complete balanced rotating assembly engineered for big block Chevrolet engines. This street and strip assembly offers excellent value and reliability for engines producing up to 500 horsepower, making it ideal for performance street builds and weekend racing applications.

Complete Assembly Includes:

• Cast steel crankshaft with improved fillet radiuses for enhanced strength
• Eagle SIR forged 5140 steel I-beam connecting rods with ARP 8740 capscrew bolts
• Hypereutectic aluminum pistons with rings
• Hastings piston rings
• Rod and main bearings
• Harmonic dampener and flexplate (for externally balanced applications)

Key Features:

• Factory balanced assembly - no additional balancing required before installation
• Quality Eagle components throughout for consistent performance
• Cast steel crankshaft provides durability for street/strip use
• I-beam rods offer excellent strength-to-weight ratio

This assembly is designed for 4.030" bore applications and provides an excellent foundation for your big block Chevy build. All Eagle "B" prefix part numbers indicate the assembly has been professionally balanced at the factory, saving installation time and ensuring proper engine operation.