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

Manley Performance is well-known for making strong internal engine components, and this BBC rotating assembly is a prime example of their commitment to building parts that can handle serious power. This BBC 548 assembly is designed for big-block Chevrolet engines looking to step up their performance game, featuring a 4.250-inch stroke and a 4.530-inch bore with a -20cc piston dish.

At the heart of this assembly is a robust 4340 forged steel crankshaft, chosen for its strength and durability under high stress. Paired with it are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16-inch ARP 8740 cap screws, a solid choice for builds up to 900 horsepower. If your build demands even more, you have the option to upgrade to ARP 2000 cap screws, which can support up to 1,500 horsepower. The assembly also includes 2618 forged aluminum Platinum Series pistons, known for their thermal stability and strength, complete with Premium Chrome Moly wrist pins for reliable operation.

This rotating assembly is a well-built foundation for a high-performance engine. It's important to note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and balancing procedures to ensure optimal performance and longevity.