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

This Manley Performance rotating assembly is built for big block Chevrolet (BBC) engines, specifically for a 548 cubic inch displacement with a 4.250 inch stroke. It's a well-built package designed to handle serious power, making it a solid choice for engine builds aiming for significant horsepower gains. The components are selected to work together as a balanced unit, simplifying the process of upgrading your engine's core strength.

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 equipped with 7/16? ARP 8740 cap screws, a popular choice for their reliability. For those pushing the limits, there's an option to upgrade to ARP 2000 cap screws, which Manley rates for up to 1,500 horsepower, compared to the 900 horsepower rating with the standard ARP 8740 screws. The pistons are Manley's Platinum Series, made from 2618 forged aluminum and include premium chrome moly wrist pins, known for their strength and ability to withstand high temperatures and pressures.

This assembly is a significant upgrade for any BBC engine build where reliability and performance are key. It's important to note that this assembly is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed specifications and installation instructions to ensure proper assembly and performance for your specific application.