Eagle 143043312 Big Block Chevy Rotating Assembly Kit 4.250" Stroke

The Eagle 143043312 is a complete rotating assembly kit designed for Chevrolet Big Block engines, delivering exceptional strength and reliability for high-performance and racing applications. This comprehensive kit includes all the critical internal components needed to build or rebuild your big block engine with confidence.

Key Components Include:

• 4.250" stroke cast steel crankshaft with .092" fillet radiuses for enhanced strength
• 7.000" Eagle H-beam connecting rods forged from 4340 chromoly steel
• 3/8" ARP 2000 series rod bolts for superior clamping force and reliability
• Forged 2618 aluminum Ross pistons with 14cc dome design (3.312" bore)
• Premium piston rings and engine bearings

Technical Specifications:

• Stroke: 4.250 inches
• Piston Bore: 3.312 inches
• Rod Length: 7.000 inches (center-to-center)
• Piston Design: 14cc dome top
• Rod Material: Forged 4340 chromoly steel
• Crank Material: Cast steel
• Rod Bolt Type: ARP 2000 series, 3/8" diameter

Eagle Specialty Products is recognized as a leading manufacturer of high-strength connecting rods and crankshafts for racing engines. This rotating assembly combines precision-engineered components that work together to deliver maximum performance, durability, and value for demanding applications. The forged 2618 aluminum pistons provide excellent strength-to-weight ratio and thermal stability, while the H-beam rods offer outstanding rigidity and reliability at high RPM.

Application: Designed for Chevrolet Big Block V8 engines including 396, 427, 454, and 502 cubic inch variants. Professional balancing is recommended before installation.