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. If you opt for the ARP 2000 cap screws, the horsepower range increases to 1,500 HP.

What materials are used in this Manley rotating assembly?

The crankshaft and connecting rods are constructed from 4340 forged steel for high strength. The pistons are made from 2618 forged aluminum, and they come with premium chrome moly wrist pins.

Is this rotating assembly legal for use in California?

No, this part is not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 28632RHXX
UPC: 807298105581

Manley Rotating Assembly, BBC 632 4.750 STROKE/4.600/-3cc

Name: Manley Rotating Assembly, BBC 632 4.750 STROKE/4.600/-3cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-632-4-750-stroke-4-600-3cc-t14-881093
Price: 4029.96 USD
Availability: BackOrder

$4029.96

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 632 rotating assembly with a 4.750" stroke. Built for high-horsepower builds up to 1500 HP.

Key Features

Fits Big Block Chevrolet (BBC) engines.
Features a 4.750 inch stroke and 4.600 inch bore.
Includes a 4340 forged steel crankshaft for strength.
Comes with 4340 forged steel H-beam connecting rods.
Connecting rods use 7/16" ARP 8740 cap screws, supporting up to 900 HP.
Optional ARP 2000 cap screws allow for up to 1,500 HP.

This rotating assembly is designed for Big Block Chevrolet (BBC) engines with a 632 cubic inch displacement, 4.750 inch stroke, and 4.600 inch bore. 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

When you're building a serious big-block Chevrolet engine for extreme power, the rotating assembly is the heart of the operation. This Manley Performance rotating assembly is designed for the 632 cubic inch displacement, featuring a 4.750-inch stroke and a 4.600-inch bore with a -3cc 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, capable of handling up to 900 horsepower. For even greater power handling, you can opt for ARP 2000 cap screws, which allow this assembly to support up to 1,500 horsepower. The pistons are Manley's Platinum Series, made from 2618 forged aluminum for a good balance of strength and light weight, and they include premium chrome moly wrist pins.

This assembly is a solid option for engine builders aiming for significant horsepower gains. Keep in mind 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.