Manley Rotating Assembly, BBC 555 4.250 STROKE/4.560/-3cc

If you're building a serious big-block Chevrolet engine and need a foundation that can handle significant power, a Manley rotating assembly is a solid choice. This particular kit is designed for a 555 cubic inch displacement, featuring a 4.250-inch stroke crankshaft and a 4.560-inch bore. It's engineered to be the heart of a high-performance engine, ready for demanding applications where reliability and strength are paramount.

At the core of this assembly is a 4340 forged steel crankshaft, known for its exceptional strength and durability under stress. Paired with it are 4340 forged steel H-beam connecting rods. These rods come equipped with 7/16-inch ARP 8740 cap screws, a popular choice for many performance builds, with an option to upgrade to ARP 2000 cap screws for even greater strength. The pistons are Manley's Platinum Series, made from 2618 forged aluminum, which offers a good balance of strength and light weight. They also include premium chrome moly wrist pins for added durability. This combination is well-suited for engines producing up to 900 horsepower with the standard ARP 8740 bolts, and can handle up to 1,500 horsepower if you opt for the ARP 2000 cap screws.

When assembling an engine of this caliber, attention to detail is crucial. Ensure all components are clean and properly lubricated during installation. This rotating assembly is a significant investment in your engine build, providing the robust internal components needed to achieve impressive power levels and long-term performance.