What is the horsepower rating for this rotating assembly?

With the standard ARP 8740 cap screws, this Manley rotating assembly is rated for up to 900 horsepower. If you upgrade to the optional ARP 2000 cap screws, it can support up to 1,500 horsepower.

What materials are used in this rotating assembly?

The crankshaft and connecting rods are constructed from strong 4340 forged steel. The pistons are made from 2618 forged aluminum, and the assembly includes Premium Chrome Moly wrist pins.

Does this assembly come with everything needed to install it?

This rotating assembly includes the crankshaft, connecting rods, pistons, and wrist pins. You will need to source main and rod bearings, piston rings, and any necessary assembly lubricants separately.

Specifications

Brand: Manley Performance
Part #: 39572R
UPC: 807298087139

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-t14-881010
Price: 4149.58 USD
Availability: BackOrder

$4149.58

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 builds.

Key Features

Fits Big Block Chevrolet (BBC) 572ci engines.
Features a 4340 forged steel crankshaft with a 4.250-inch stroke.
Includes 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws.
Comes with 2618 forged aluminum Platinum Series pistons and Premium Chrome Moly wrist pins.
Supports up to 900 horsepower with standard ARP 8740 cap screws.
Supports up to 1,500 horsepower with optional ARP 2000 cap screws.

This rotating assembly is designed for Big Block Chevrolet (BBC) 572 cubic inch engines with a 4.250-inch stroke and 4.625-inch bore. It is not CARB approved and cannot be shipped to California.

⚠️ 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 Performance rotating assembly is built for big-block Chevrolet (BBC) engines, specifically designed for a 572 cubic inch displacement with a 4.250-inch stroke and 4.625-inch bore. If you're looking to build a serious performance engine, this assembly is a solid foundation. It includes a forged steel crankshaft, forged steel connecting rods, and forged aluminum pistons, all designed to handle significant power.

The crankshaft and H-beam connecting rods are both made from 4340 forged steel, a strong material that can withstand the stresses of high-performance operation. The connecting rods come with 7/16-inch ARP 8740 cap screws, with an option to upgrade to ARP 2000 cap screws for even greater strength. The pistons are Manley's Platinum Series, made from 2618 forged aluminum and include Premium Chrome Moly wrist pins. This combination of well-built components means you're getting a rotating assembly that's ready for aggressive use.

With the standard ARP 8740 bolts, this assembly is rated for up to 900 horsepower. If you opt for the ARP 2000 cap screws, the assembly can support an impressive 1,500 horsepower. This makes it a versatile choice for a wide range of high-performance BBC applications, from street machines to dedicated drag racing engines. Please note that this assembly is not CARB approved and cannot be shipped to California.