Eagle Specialty Products B15402E030 Balanced Rotating Assembly Chevy 350 355ci 4.030 Bore

The Eagle Specialty Products B15402E030 is a complete balanced street and strip rotating assembly designed for Chevy 350 small block engines with a .030" overbore, creating a 355 cubic inch displacement. This professionally balanced kit delivers exceptional reliability and performance for naturally aspirated street vehicles running pump gas.

Complete Assembly Includes:

• Cast crankshaft with 3.480" stroke and 2.100" rod journals
• 5.700" press-fit I-beam connecting rods constructed from 5140 steel
• 3/8" ARP 8740 capscrew rod bolts for superior strength
• Hypereutectic KB Claimer flat top pistons with -7cc dish, sized at 4.030" bore
• Plasma-moly standard gap piston rings
• King SI connecting rod and main bearings

This assembly is designed for 2-piece rear main seal blocks and features internal balancing for smooth operation. The hypereutectic pistons provide excellent durability and thermal characteristics, while the cast crankshaft includes .092" fillet radiuses for improved strength over stock components. The press-fit rod design ensures secure piston pin retention, and all components are precision-balanced as a complete assembly for optimal performance and longevity.

Specifications:

• Displacement: 355 cubic inches (5.8L)
• Bore: 4.030 inches
• Stroke: 3.480 inches
• Rod Length: 5.700 inches center-to-center
• Piston Style: Flat top with -7cc volume and four valve reliefs
• Rear Main Seal: 2-piece seal configuration
• Balance: Internally balanced, pre-balanced assembly

California Prop 65 Warning: This product contains chemicals including nickel, which is known to the State of California to cause cancer, birth defects, or other reproductive harm.