What is the horsepower rating for this rotating assembly?

With the standard 7/16-inch ARP 8740 cap screws, this assembly is rated for up to 900 horsepower. If you opt for the upgrade to ARP 2000 cap screws, it can support builds up to 1,500 horsepower.

What material are the crankshaft and connecting rods made from?

Both the crankshaft and the connecting rods are forged from 4340 steel. This material is known for its strength and durability, making it suitable for high-performance engine applications.

Specifications

Brand: Manley Performance
Part #: 28572HX
UPC: 807298089690

Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/-3cc

Name: Manley Rotating Assembly, BBC 572 4.250 STROKE/4.625/-3cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-572-4-250-stroke-4-625-3cc-t14-881069
Price: 3822.13 USD
Availability: BackOrder

$3822.13

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Manley BBC 572 Rotating Assembly with 4.250" stroke. Built with 4340 forged steel components for high-horsepower builds.

Key Features

The crankshaft is forged from 4340 steel for strength.
Connecting rods are forged 4340 steel H-beam style.
Rods include 7/16-inch ARP 8740 cap screws, supporting up to 900 horsepower.
Optional ARP 2000 cap screws are available for builds up to 1,500 horsepower.
Pistons are 2618 forged aluminum Platinum Series.
Premium chrome moly wrist pins are included with the pistons.

This rotating assembly is designed for BBC (Big Block Chevrolet) 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

This Manley rotating assembly starts with a 4340 forged steel crankshaft, designed for serious BBC builds. It features a 4.250-inch stroke and is paired with 4.625-inch bore pistons that have a -3cc dish, making it a solid foundation for a 572 cubic inch engine.

The connecting rods are also forged from 4340 steel in an H-beam design, ready to handle significant stress. They come equipped with 7/16-inch ARP 8740 cap screws, capable of supporting up to 900 horsepower. For those pushing the limits, an upgrade to optional ARP 2000 cap screws is available, allowing this assembly to handle up to 1,500 horsepower. The pistons are forged from 2618 aluminum, part of Manley's Platinum Series, and include premium chrome moly wrist pins for durability.

This assembly is a well-built package for engine builders looking for robust components for a high-performance BBC engine. 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.