Manley Rotating Assembly, BBC 555 4.250 STROKE/4.560/-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 performance. This kit is designed for big block Chevrolet engines and features a 555 cubic inch displacement with a 4.250-inch stroke and a 4.560-inch bore. It’s a complete package that gives you the core rotating parts needed to build a serious engine.

At the heart of this assembly is a 4340 forged steel crankshaft, chosen for its strength and durability under high stress. Paired with this are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16? ARP 8740 cap screws, a solid choice for builds up to 900 horsepower. If your build is pushing the limits, you can opt for ARP 2000 cap screws, which can handle up to 1,500 horsepower. The pistons are made from 2618 forged aluminum, part of Manley's Platinum Series, and include premium chrome moly wrist pins. This combination of materials and construction means these components are built to withstand the demands of powerful engines.

This assembly is a significant upgrade for any performance-oriented big block Chevrolet build. Keep in mind 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 tuning.