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

If you're building a serious big block Chevrolet engine, this Manley rotating assembly is a solid foundation. This kit is designed for a 555 cubic inch displacement, featuring a 4.250-inch stroke crankshaft and pistons with a 4.560-inch bore and a +43cc dome volume. It's a well-built package aimed at serious performance builds where reliability and strength are paramount.

At the heart of this assembly is a 4340 forged steel crankshaft, chosen for its strength and durability under high stress. The connecting rods are also made from 4340 forged steel, featuring an H-beam design for excellent rigidity. These rods come equipped with 7/16-inch ARP 8740 cap screws, which are capable of handling up to 900 horsepower. For those pushing the limits, there's an option to upgrade to ARP 2000 cap screws, allowing the assembly to support 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 for added strength and longevity.

This rotating assembly is a significant investment in your engine's performance and durability. It's important to note that this part is not CARB approved and cannot be shipped to California. Ensure you consult with your engine builder to confirm this assembly meets all your specific build requirements and local emissions regulations.