Eagle B15402E040 Small Block Chevy CI Balanced Rotating Assembly - 357 Kit

The Eagle B15402E040 is a complete balanced rotating assembly kit engineered for street and strip performance in Small Block Chevy engines. This internally balanced kit delivers reliable power for engines producing up to 500 horsepower and is designed specifically for pre-1986 SBC engines with 2-piece rear main seals.

Complete Assembly Specifications:

• Displacement: 357 cubic inches
• Bore: 4.040 inches (.040 oversize)
• Stroke: 3.480 inches
• Connecting Rod Length: 5.700 inches
• Compression: Approximately 10.2:1 with 64cc heads
• Internal balance design

Kit Includes:

• Eagle cast steel crankshaft with 2.100-inch rod journals
• Eagle SIR I-beam connecting rods constructed from 5140 alloy steel
• Silvolite hypereutectic cast pistons with -7cc flat top design
• Plasma-moly file-fit piston rings
• King SI series connecting rod and main bearings
• ARP 8740 connecting rod bolts (3/8-inch)

This is a factory-balanced assembly from Eagle Specialty Products, indicated by the "B" prefix in the part number, requiring no additional balancing work. The kit provides an affordable, reliable foundation for building a performance Small Block Chevy engine with excellent street manners and strip capability.