What is the horsepower rating for this rotating assembly?

With the standard 7/16-inch ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. Upgrading to optional ARP 2000 cap screws increases the horsepower range to 1,500 HP.

What materials are the crankshaft, rods, and pistons made from?

The crankshaft is constructed from 4340 forged steel. The connecting rods are also 4340 forged steel H-beams, and the pistons are made from 2618 forged aluminum.

Specifications

Brand: Manley Performance
Part #: 39582
UPC: 807298087191

Manley Rotating Assembly, BBC 582 4.375 STROKE/4.600/+43cc

Name: Manley Rotating Assembly, BBC 582 4.375 STROKE/4.600/+43cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-582-4-375-stroke-4-600-43cc-t14-881015
Price: 4039.22 USD
Availability: BackOrder

$4039.22

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Manley Performance BBC 582 rotating assembly, 4.375 stroke. Built for high horsepower applications up to 1500 HP.

Key Features

Fits Big Block Chevrolet (BBC) engines.
Features a 4.375 inch stroke and 4.600 inch bore with +43cc piston dish.
Includes a 4340 forged steel crankshaft for strength.
Comes with 4340 forged steel H-beam connecting rods.
Rods are equipped with 7/16-inch ARP 8740 cap screws, supporting up to 900 HP.
Optional ARP 2000 cap screws are available for increased horsepower support up to 1,500 HP.

This rotating assembly is designed for Big Block Chevrolet (BBC) engines. Please verify compatibility with your specific engine block and build specifications.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're building a serious big-block Chevrolet engine, this Manley rotating assembly is a solid foundation. This specific kit is designed for a 582 cubic inch displacement with a 4.375-inch stroke and a 4.600-inch bore, featuring pistons with a +43cc dish volume. It's a well-built package aimed at serious performance builds where reliability under high stress is paramount.

At the heart of this assembly is a 4340 forged steel crankshaft, chosen for its strength and durability in demanding applications. Paired with this are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16-inch ARP 8740 cap screws, capable of handling up to 900 horsepower. For those pushing the limits further, there's an option to upgrade to ARP 2000 cap screws, which can 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 for a high-performance engine build. It's important to note that this part is not CARB approved and cannot be shipped to California. Ensure you have the correct machine work done for your block and that all components are balanced before final assembly to achieve the best results.