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 increases the rating to 1,500 horsepower.

What type of pistons are included?

This assembly includes 2618 forged aluminum Platinum Series pistons. They feature a +43cc dish and come with premium chrome moly wrist pins.

Are there any shipping restrictions for this product?

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

Specifications

Brand: Manley Performance
Part #: 39572RHXX
UPC: 807298087160

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-t14-881012
Price: 4291.39 USD
Availability: BackOrder

$4291.39

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 with a 4.250" stroke. Built for serious power with forged steel and aluminum components.

Key Features

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 with 7/16" ARP 8740 cap screws.
Optional ARP 2000 cap screws are available for increased horsepower capacity.
Comes with 2618 forged aluminum Platinum Series pistons.
Includes premium chrome moly wrist pins.

This rotating assembly is designed for Big Block Chevrolet (BBC) 572 engines. Please verify 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 displacement, featuring a 4.250-inch stroke and 4.625-inch bore with +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 for engines up to 900 horsepower. For those pushing the limits, there's an option to upgrade to ARP 2000 cap screws, allowing the assembly to handle up to 1,500 horsepower. The pistons are forged aluminum from Manley's Platinum Series, designed with a +43cc dish to achieve specific compression ratios, and they include premium chrome moly wrist pins for added strength.

This assembly is a robust starting point for a powerful BBC build. Please note that this part is not CARB approved and cannot be shipped to California. Always consult manufacturer documentation for complete installation details and recommended pairings.