What is the horsepower rating for this rotating assembly?

With the standard 7/16-inch ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 900 horsepower. An optional upgrade to ARP 2000 cap screws increases the horsepower range to 1,500.

What material are the crankshaft and connecting rods made from?

The crankshaft and the H-beam connecting rods are both constructed from 4340 forged steel. This material is chosen for its exceptional strength and durability under high stress.

Can this rotating assembly be shipped to California?

No, this rotating assembly is not CARB approved and cannot be shipped to California due to emissions regulations. It also carries a Proposition 65 warning.

Specifications

Brand: Manley Performance
Part #: 29632RHX
UPC: 807298087733

Manley Rotating Assembly, BBC 632 4.750 STROKE/4.600/+43cc

Name: Manley Rotating Assembly, BBC 632 4.750 STROKE/4.600/+43cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-632-4-750-stroke-4-600-43cc-t14-880973
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 Performance BBC 632 rotating assembly with a 4.750" stroke and 4.600" bore. Built for serious power.

Key Features

Fits BBC (Big Block Chevrolet) engines.
Features a 4.750 inch stroke and 4.600 inch bore for 632 cubic inches.
Includes a 4340 forged steel crankshaft for robust performance.
Comes with 4340 forged steel H-beam connecting rods.
Connecting rods are equipped with 7/16? ARP 8740 cap screws, supporting up to 900 horsepower.
Optional ARP 2000 cap screws are available for connecting rods, supporting up to 1,500 horsepower.

This rotating assembly is designed for Big Block Chevrolet (BBC) engines. Please consult with a professional or refer to 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

Manley Performance is well-known for making strong internal engine components, and this BBC rotating assembly is a prime example of their commitment to building parts that can handle serious power. If you're building a big-block Chevrolet engine for high-performance applications, this assembly is designed to be the heart of your build. It features a 632 cubic inch displacement with a 4.750-inch stroke and a 4.600-inch bore, ready to be the foundation for significant horsepower.

At its core is a 4340 forged steel crankshaft, chosen for its strength and reliability under extreme 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 even further, there's an option to upgrade to ARP 2000 cap screws, which can support up to 1,500 horsepower. The pistons are 2618 forged aluminum from Manley's Platinum Series, known for their durability and heat resistance, and they include premium chrome moly wrist pins for added strength.

This assembly is a well-built package for anyone serious about maximizing their big-block Chevrolet's potential. Please note that this part is not CARB approved and cannot be shipped to California. It's also important to be aware of California's Proposition 65 warning.