What is the horsepower rating for this rotating assembly?

With the standard ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. If you opt for the ARP 2000 cap screws, the rating increases to 1,500 horsepower.

What materials are the main components made from?

The crankshaft and connecting rods are constructed from 4340 forged steel for high strength. The pistons are made from 2618 forged aluminum, a material known for its thermal stability in high-performance applications.

Does this rotating assembly come with everything needed for installation?

This assembly includes the crankshaft, connecting rods, pistons, and wrist pins. It is recommended to consult the manufacturer's instructions for a complete list of required assembly components and hardware.

Specifications

Brand: Manley Performance
Part #: 39572
UPC: 807298087092

Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/+43cc

Name: Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/+43cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-572-4-250-stroke-4-625-43cc-t14-881006
Price: 4039.22 USD
Availability: BackOrder

$4039.22

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 572 Rotating Assembly. Built for serious power with forged components and high-strength fasteners.

Key Features

This rotating assembly fits BBC 572 engines with a 4.250-inch stroke and 4.625-inch bore.
Includes a 4340 forged steel crankshaft for strength and durability.
Features 4340 forged steel H-beam connecting rods.
Connecting rods are equipped with 7/16-inch ARP 8740 cap screws, supporting up to 900 horsepower.
Optional ARP 2000 cap screws are available for connecting rods, supporting 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 Chevrolet (BBC) 572 cubic inch engines. Check manufacturer specifications to confirm compatibility with your specific 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

If you're building a serious big-block Chevrolet engine, a strong rotating assembly is the heart of the operation. This Manley rotating assembly is designed for the 572 cubic inch platform, featuring a 4.250-inch stroke and a 4.625-inch bore with a +43cc piston dish. It’s a well-built foundation for a high-performance engine build.

At its core is a 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, a solid choice capable of handling up to 900 horsepower. For those pushing the limits, optional ARP 2000 cap screws are available, raising the horsepower ceiling to an impressive 1,500 HP. The assembly includes 2618 forged aluminum Platinum Series pistons, known for their thermal stability and strength, complete with premium chrome moly wrist pins for reliable operation.

This assembly is a robust option for engine builders aiming for significant power output. Please note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and torque specifications.