Manley Rotating Assembly, BBC 548 4.250 STROKE/4.530/-20cc

Manley Performance is well-known for making strong internal engine components. This BBC 548 rotating assembly is a prime example, designed for builders looking to push the limits of their big-block Chevrolet engine. It includes a 4.250-inch stroke crankshaft, H-beam connecting rods, and forged aluminum pistons, all engineered to work together as a balanced unit for serious power.

The heart of this assembly is the 4340 forged steel crankshaft, chosen for its strength and durability under high stress. Paired with that are 4340 forged steel H-beam connecting rods, which are robust enough to handle significant loads. These rods come standard with 7/16-inch ARP 8740 cap screws, but you can opt for ARP 2000 cap screws for even greater strength, allowing for builds up to 1,500 horsepower. The pistons are 2618 forged aluminum from Manley's Platinum Series, complete with Premium Chrome Moly wrist pins, ensuring they can withstand the intense pressures and heat generated in a high-performance engine. This combination is rated for up to 900 horsepower with the standard ARP 8740 bolts, and up to 1,500 horsepower when upgraded to ARP 2000 bolts.

This rotating assembly is a solid foundation for a high-horsepower BBC build. Please note that this part is not CARB approved and cannot be shipped to California. It is recommended to consult with your engine builder to ensure this assembly meets your specific project requirements.