Eagle B1690306057 Balanced Rotating Assembly - Kit 8-Cylinder

The Eagle B1690306057 is a factory-balanced rotating assembly designed for 8-cylinder small block Chevrolet engines. This complete kit delivers a reliable street performance solution for engines producing up to 500 horsepower.

Complete Assembly Includes:

• 4.000" cast steel crankshaft with .092" fillet radiuses for improved strength
• 6.200" Eagle SIR forged 5140 steel I-Beam connecting rods
• 3/8" ARP 8740 capscrew rod bolts
• Forged 4032 aluminum flat-top pistons with -3cc valve relief (4.060" bore)
• Plasma-moly piston rings with standard gap
• King SI series rod and main bearings
• Harmonic balancer and flexplate (for externally balanced applications)

Key Features:

• Factory balanced by Eagle - ready to install with no additional balancing required
• Forged I-Beam rods bushed for full-floating piston pins
• Cast steel crankshaft with increased fillet radiuses versus OEM
• Complete bearing set for simplified installation

This rotating assembly provides excellent value for street performance builds, combining quality components with factory precision balancing. The cast steel crankshaft offers adequate strength for street and mild strip applications, while the forged connecting rods deliver durability and reliability.