Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/-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 building parts that can handle serious power. This 565 cubic inch assembly is built around a 4.250-inch stroke crankshaft and is designed for a 4.600-inch bore with a -3cc piston dish. It’s a complete package for anyone looking to build a high-performance big block Chevrolet engine.

At the heart of this assembly is a 4340 forged steel crankshaft, chosen for its strength and durability under high stress. Paired with it are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16-inch ARP 8740 cap screws, a solid choice for many performance builds. If you're aiming for the upper limits of its capability, you can opt for ARP 2000 cap screws, which significantly increase the horsepower rating this assembly can reliably handle. 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 heat generated in a powerful engine.

This rotating assembly is rated for up to 900 horsepower when using the standard ARP 8740 cap screws. For those pushing the boundaries, upgrading to the optional ARP 2000 cap screws allows this assembly to support an impressive 1,500 horsepower. It's important to note that this assembly is not CARB approved and cannot be shipped to California. Ensure you have the correct supporting components and machining done to properly install this high-performance rotating assembly.