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

If you're building a serious big-block Chevrolet engine for serious power, a robust rotating assembly is where it all starts. This Manley Performance rotating assembly is designed for those who want to push the limits, whether for drag racing, serious street performance, or other demanding applications. It centers around a 4.250-inch stroke crankshaft, creating a 548 cubic inch displacement when paired with a 4.530-inch bore, giving you the foundation for massive torque and horsepower.

Manley has built a solid reputation for making strong internal engine components, and this assembly is no exception. The crankshaft and H-beam connecting rods are forged from 4340 steel, a material known for its excellent strength and durability under high stress. The rods come equipped with 7/16-inch ARP 8740 cap screws, which are a popular choice for builds up to 900 horsepower. For even more power, you can opt for ARP 2000 cap screws, allowing this assembly to handle up to 1,500 horsepower. The pistons are forged from 2618 aluminum, a common choice for high-performance applications due to its strength and thermal properties, and they include Premium Chrome Moly wrist pins for added reliability.

This assembly is a well-built package for anyone serious about maximizing their big-block Chevy's potential. 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 balancing procedures to ensure optimal performance and longevity.