Manley Rotating Assembly, BBC 548 4.250 STROKE/4.530/-20cc

The 4340 forged steel crankshaft is the heart of this Manley rotating assembly, ready to handle serious power. This BBC 548 package is designed for builders looking to push the limits of their big-block Chevrolet engine, offering a 4.250-inch stroke and a 4.530-inch bore with a -20cc piston dish. It's a well-built foundation for a high-performance build where reliability under stress is paramount.

You'll find 4340 forged steel H-beam connecting rods included, which come standard with 7/16? ARP 8740 cap screws. For those aiming for the upper echelon of horsepower, an upgrade to optional ARP 2000 cap screws is available, allowing this assembly to reliably handle up to 1,500 horsepower. The pistons are Manley's Platinum Series, forged from 2618 aluminum and paired with premium chrome moly wrist pins, ensuring they can withstand the demands of high-RPM operation and significant cylinder pressures. This combination is engineered to provide a strong and durable rotating assembly capable of supporting up to 900 horsepower with the standard ARP 8740 fasteners, or up to 1,500 horsepower with the optional ARP 2000 fasteners.

This rotating assembly is a significant investment in your engine's performance and longevity. 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 your specific build requirements and local emissions regulations.