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 ARP 2000 cap screws, the rating increases to 1,500 horsepower.

What materials are used in this Manley rotating assembly?

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

Are there any restrictions on shipping this part?

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

Specifications

Brand: Manley Performance
Part #: 29632R
UPC: 807298080499

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-t14-880971
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 632 4.750 STROKE/4.600/+43cc. A well-built rotating assembly for high-horsepower BBC builds.

Key Features

Fits BBC (Big Block Chevrolet) engines.
Features a 4.750-inch stroke 4340 forged steel crankshaft.
Includes 4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws.
Comes with 2618 forged aluminum Platinum Series pistons and Premium Chrome Moly wrist pins.
Rated for up to 900 horsepower with standard ARP 8740 cap screws.
Can support up to 1,500 horsepower with optional ARP 2000 cap screws.

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

Starting with a 4340 forged steel crankshaft, this Manley rotating assembly is built for serious power. It's designed for BBC (Big Block Chevrolet) engines and features a 4.750-inch stroke, paired with a 4.600-inch bore and pistons with a +43cc dish volume. This combination is key for achieving the 632 cubic inch displacement this assembly is known for.

The connecting rods are also made from 4340 forged steel, featuring an H-beam design for strength. They come standard with 7/16-inch ARP 8740 cap screws, capable of handling up to 900 horsepower. If your build demands even more, you have the option to upgrade to ARP 2000 cap screws, which can support up to 1,500 horsepower. The pistons are constructed from 2618 forged aluminum, part of Manley's Platinum Series, and include Premium Chrome Moly wrist pins for durability under extreme conditions.

This assembly is a solid foundation for a high-performance engine 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.