Eagle B15403E030 Small Block Chevy Rotating Assembly - 355ci

The Eagle B15403E030 is a complete street and strip rotating assembly designed for pre-1986 Small Block Chevy engines with 2-piece rear main seals. This factory-balanced kit builds a 355 cubic inch engine with a .030 inch overbore and delivers reliable performance for naturally aspirated street engines producing up to 500 horsepower.

Complete Assembly Includes:

• Eagle cast steel crankshaft with 3.480 inch stroke
• Eagle SIR I-beam connecting rods with 5.700 inch length
• Silv-O-Lite hypereutectic pistons with -10cc flat top design for 4.030 inch bore
• Plasma moly file-fit piston rings
• Clevite or King performance bearings

Key Specifications:

• Displacement: 355 cubic inches at .030 overbore
• Bore: 4.030 inches
• Stroke: 3.480 inches
• Rod Length: 5.700 inches
• Piston Type: -10cc flat top
• Balance: Internal (no balancer or flexplate included)
• Ring Type: Plasma moly file fit

This is a fully balanced assembly that requires no additional machine work. The internal balance design means you'll need to source a neutral balance harmonic dampener and flexplate separately. Compatible with both 2-bolt and 4-bolt main blocks. An excellent choice for affordable performance and reliability in street performance applications.