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

If you're building a serious big-block Chevrolet engine, this Manley Performance rotating assembly is a solid foundation. This specific kit is designed for a 555 cubic inch displacement, featuring a 4.250-inch stroke crankshaft and a 4.560-inch bore size with a -3cc piston dish. It's built to handle significant power, making it a popular choice for high-performance street and race applications where reliability under stress is paramount.

At the heart of this assembly is a 4340 forged steel crankshaft, chosen for its strength and durability under extreme loads. Complementing the crank are 4340 forged steel H-beam connecting rods. These rods come equipped with 7/16-inch ARP 8740 cap screws, a well-known standard for robust fastening. For those pushing the limits even further, optional ARP 2000 cap screws are available, allowing this assembly to reliably handle up to 1,500 horsepower. The pistons are forged from 2618 aluminum, part of Manley's Platinum Series, and include premium chrome moly wrist pins, ensuring they can withstand the intense pressures and temperatures of a high-output engine.

This rotating assembly is rated for 900 horsepower with the standard ARP 8740 bolts and can be safely used up to 1,500 horsepower when upgraded to ARP 2000 bolts. Please note that this assembly is not CARB approved and cannot be shipped to California. It's crucial to ensure all components are balanced and installed according to manufacturer specifications for optimal performance and longevity.