What horsepower levels can this rotating assembly support?

With the standard 7/16-inch 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 horsepower support increases to 1,500.

What specific components are included in this Manley rotating assembly?

This assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods with ARP 8740 cap screws, and 2618 forged aluminum pistons with premium chrome moly wrist pins.

Are there any restrictions on where this part can be shipped?

Yes, this rotating assembly is not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 39572RHX
UPC: 807298087153

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-t14-881011
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 Rotating Assembly, BBC 572 4.250 STROKE/4.625/+43cc. Built for high-horsepower BBC engines.

Key Features

This package includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods, and 2618 forged aluminum pistons.
The connecting rods are equipped with 7/16-inch ARP 8740 cap screws and can support up to 900 horsepower.
Optional ARP 2000 cap screws are available for the connecting rods, allowing support for up to 1,500 horsepower.
The pistons are Manley's Platinum Series, made from 2618 forged aluminum and include premium chrome moly wrist pins.
This rotating assembly is designed for BBC 572 cubic inch engines with a 4.250-inch stroke and a 4.625-inch bore.
The pistons have a +43cc dish volume.

This rotating assembly is designed for BBC 572 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

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

When you're building a serious big-block Chevrolet engine, starting with a well-matched rotating assembly is key. This Manley Performance 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. What you get in this package is a complete set of core components: a robust 4340 forged steel crankshaft, a set of 4340 forged steel H-beam connecting rods, and a set of 2618 forged aluminum pistons.

The crankshaft and connecting rods are forged from 4340 steel, a material known for its strength and durability under high stress. The H-beam connecting rods come standard with 7/16-inch ARP 8740 cap screws, capable of handling up to 900 horsepower. If your build demands more, you have the option to upgrade to ARP 2000 cap screws, which can support an impressive 1,500 horsepower. The pistons are forged from 2618 aluminum, a popular choice for performance applications due to its thermal expansion properties, and they include premium chrome moly wrist pins for added strength.

This assembly is intended for high-performance applications and is not CARB approved, meaning it cannot be shipped to California. It's a solid foundation for a powerful BBC engine build, providing the essential, well-built components you need to get started.