Manley 39615RX BBC CID Rotating Assembly Kit Stroke Bore - 615 4.625 4.600 43cc

The Manley 39615RX is a complete Big Block Chevy (BBC) 615 CID rotating assembly kit engineered for serious high-performance and racing applications. Built around a 4.625-inch stroke crankshaft and designed for a 4.600-inch bore, this stroker kit displaces an impressive 615 cubic inches, delivering the foundation for massive torque and horsepower output.

Manley Performance is renowned for manufacturing precision engine components used in professional motorsports and high-output street builds. This rotating assembly kit is designed to provide a system-matched combination of components that work together for maximum reliability and performance under extreme conditions.

Key Specifications:

• Application: Big Block Chevrolet (BBC)
• Displacement: 615 CID
• Stroke: 4.625 inches
• Bore: 4.600 inches
• Piston Dish/Dome: 43cc
• Part Number: 39615RX

Kit Contents typically include:

• Manley forged 4340 steel crankshaft
• Manley forged 4340 H-beam or I-beam connecting rods
• Manley forged pistons (43cc specification)
• Piston rings
• Rod and main bearings

Manley's rotating assembly kits are precision-balanced and manufactured to tight tolerances, making them a preferred choice for engine builders seeking a reliable, high-displacement BBC foundation. The 43cc piston specification allows builders to dial in target compression ratios when paired with appropriate cylinder heads.