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. An optional upgrade to ARP 2000 cap screws increases the rating to 1,500 horsepower.

What are the key components included in this assembly?

This Manley rotating assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods, and 2618 forged aluminum Platinum Series pistons with wrist pins.

Specifications

Brand: Manley Performance
Part #: 39582RHX
UPC: 807298087252

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-t14-881021
Price: 4273.61 USD
Availability: BackOrder

$4273.61

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley BBC 582 rotating assembly for big block Chevy. Features forged steel crank and rods, and forged aluminum pistons for up to 1500 HP.

Key Features

Fits Big Block Chevy engines with a 4.600 inch bore and +43cc piston dish.
Features a 4.375 inch stroke crankshaft made from 4340 forged steel.
Includes 4340 forged steel H-beam connecting rods with 7/16 inch ARP 8740 cap screws.
Capable of supporting up to 900 horsepower with standard ARP 8740 cap screws.
Optional ARP 2000 cap screws allow for support up to 1,500 horsepower.
Comes with 2618 forged aluminum Platinum Series pistons and Premium Chrome Moly wrist pins.

This rotating assembly is designed for Big Block Chevy engines with specific bore and piston dish volume requirements. Please verify compatibility with your engine build.

⚠️ 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

This is the Manley BBC 582 rotating assembly, built for serious big block Chevy performance builds. It's designed around a 4.375-inch stroke and a 4.600-inch bore with +43cc piston dish, creating a 582 cubic inch displacement. This assembly is the heart of a powerful engine, ready to handle significant output.

At its core is a robust 4340 forged steel crankshaft, chosen for its strength and durability under high stress. 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, an upgrade to optional ARP 2000 cap screws is available, raising the horsepower ceiling to 1,500.

The assembly also includes 2618 forged aluminum Platinum Series pistons. These pistons are lightweight yet strong, featuring Premium Chrome Moly wrist pins for reliable operation. The specific dish volume of +43cc is factored into the overall compression ratio calculation for your build. Please note this assembly is not CARB approved and cannot be shipped to California. It is also subject to California's Prop 65 warning.