Eagle B13305E040 Small Block Chevy 350 Street Performance Rotating Assembly Kit 0.040" Oversize

The Eagle B13305E040 is a complete balanced rotating assembly designed for small block Chevrolet 350 engines with 2-piece rear main seals. This street performance kit provides exceptional value and reliability for naturally aspirated engines producing up to 500 horsepower.

Complete Assembly Includes:

• Eagle cast steel crankshaft with improved strength and durability
• Eagle "SIR" I-beam connecting rods with 3/8" ARP 8740 bolts
• Hypereutectic aluminum pistons at 0.040" oversize bore
• Hastings piston rings with standard gap
• Clevite or King rod and main bearings
• Harmonic balancer and 168-tooth flexplate for externally balanced configuration

This balanced assembly is test-fitted at the factory to ensure all components work together seamlessly, eliminating the need for additional balancing work. The cast steel crankshaft features improved fillet radiuses for enhanced strength over OEM components, while the forged I-beam connecting rods provide excellent durability for street and strip applications. Eagle's precision manufacturing ensures proper bearing clearances and component compatibility right out of the box.

Application Notes: Designed for pre-1986 small block Chevrolet engines with 2-piece rear main seals. External balance configuration requires the included balancer and flexplate or compatible GM 400 small block external balanced components.