Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/-3cc

Manley Performance is well-known for making strong internal engine components, and this BBC rotating assembly is a prime example of their commitment to quality. If you're building a big-block Chevrolet engine, especially one aiming for serious power, this assembly is designed to handle the stress. It includes a 4.250-inch stroke 4340 forged steel crankshaft, which is the foundation for a larger displacement like the 572ci. This crankshaft is built to withstand significant forces, making it suitable for performance applications.

Complementing the crankshaft are 4340 forged steel H-beam connecting rods. These rods are a popular choice for performance builds because they offer a good balance of strength and weight. They come equipped with 7/16-inch ARP 8740 cap screws, known for their reliability. For those pushing the limits even further, there's an option to upgrade to ARP 2000 cap screws, which can support higher horsepower levels. The assembly also features 2618 forged aluminum pistons, part of Manley's Platinum Series. These pistons are lightweight and strong, designed to work with the included Premium Chrome Moly wrist pins. The specific piston dish is -3cc, which will affect your final compression ratio depending on your cylinder head volume.

This rotating assembly is rated for up to 900 horsepower when using the standard ARP 8740 bolts, and it can handle up to 1,500 horsepower if you opt for the ARP 2000 cap screws. It's important to note that this assembly is not CARB approved and cannot be shipped to California. When planning your build, consider the total package needed for a complete engine, including bearings, piston rings, and proper balancing if required by your specific application. Always refer to the manufacturer's installation instructions for critical details.