Manley Rotating Assembly, BBC 555 4.250 STROKE/4.560/+43cc

Built around a 4340 forged steel crankshaft with a 4.250-inch stroke, this Manley rotating assembly is designed for serious BBC (Big Block Chevrolet) builds aiming for significant power. The 4340 forged steel H-beam connecting rods are a strong choice, coming standard with 7/16? ARP 8740 cap screws, which are rated for up to 900 horsepower. If your build is pushing the limits, you can opt for ARP 2000 cap screws, increasing the assembly's horsepower capacity to a robust 1,500 HP.

Complementing the crankshaft and rods are 2618 forged aluminum Platinum Series pistons. These pistons are known for their strength and ability to handle high cylinder pressures, and they come complete with Premium Chrome Moly wrist pins for added durability. The piston dish is a +43cc, which will factor into your final compression ratio depending on your cylinder head volume. This is a well-built assembly intended for performance applications where reliability and strength are paramount.

When considering this rotating assembly, remember that it is not CARB approved and cannot be shipped to California. It's crucial to ensure this assembly is compatible with your specific engine block and cylinder heads, as well as your intended camshaft and tuning strategy, to achieve your desired performance goals. This is a foundational piece for a high-output engine build.