Manley Chevrolet Big Block Rotating Assembly BBC 555 CID 4.250in Stroke 4.560in Bore -3cc

Manley Rotating Assemblies are engineered as complete, matched systems to deliver maximum strength, balance, and performance in high-demand engines. Featuring precision-forged crankshafts, high-strength connecting rods, and premium pistons, each component is designed to work together seamlessly for optimal durability and efficiency. Tight tolerances and careful material selection ensure excellent load handling, reduced friction, and consistent performance under extreme RPM and cylinder pressure. By combining Manley’s proven rod, piston, and crank technologies into a unified package, these assemblies provide the reliability and confidence engine builders demand when pushing the limits of power.

• 4340 Forged steel H-Beam connecting rods with 7/16 ARP 8740 or optional ARP 2000 cap screws
• Horsepower range is 900 with the ARP 8740 and 1,500 with the optional ARP 2000 cap screws
• 2618 Forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins
• 4340 Forged steel crankshaft