What is the horsepower rating for this rotating assembly?

With the standard 7/16" ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. Upgrading to optional ARP 2000 cap screws raises the rating to 1,500 horsepower.

What materials are used in this Manley rotating assembly?

The crankshaft and connecting rods are constructed from strong 4340 forged steel. The pistons are made from 2618 forged aluminum, and they include premium chrome moly wrist pins.

Specifications

Brand: Manley Performance
Part #: 39582HX
UPC: 807298087214

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-t14-881017
Price: 4163.25 USD
Availability: BackOrder

$4163.25

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Manley Rotating Assembly, BBC 582 4.375 STROKE/4.600/+43cc. Built for high-horsepower BBC engines.

Key Features

Fits Big Block Chevrolet (BBC) engines for 582 cubic inch displacement.
Includes a 4340 forged steel crankshaft with a 4.375-inch stroke.
Features 4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws, rated for up to 900 horsepower.
Optional ARP 2000 cap screws for connecting rods are available, increasing the horsepower rating to 1,500.
Comes with 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
Piston dish is +43cc, designed to work with a 4.600-inch bore.

This rotating assembly is designed for Big Block Chevrolet (BBC) engines with a 582 cubic inch displacement, 4.375-inch stroke, and 4.600-inch bore with +43cc pistons. Always verify compatibility with your specific engine block and build plan.

⚠️ 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 (BBC) engine, this Manley rotating assembly is a solid foundation. This specific kit is designed for a 582 cubic inch displacement, featuring a 4.375-inch stroke and pistons with a +43cc dish, which works with a 4.600-inch bore. It's a well-built package aimed at serious performance builds where reliability under high stress is key.

At the heart of this assembly is a 4340 forged steel crankshaft, chosen for its strength and durability in demanding applications. Paired with it 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 even further, there's an option to upgrade to ARP 2000 cap screws, which raises the horsepower ceiling to 1,500. The pistons are forged aluminum from Manley's Platinum Series, designed for performance and longevity, and they include premium chrome moly wrist pins.

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 supporting components, such as a compatible block, cylinder heads, and camshaft, to achieve your desired engine performance.