What is the horsepower rating for this rotating assembly?

With the standard ARP 8740 cap screws included, 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 rotating assembly?

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

Specifications

Brand: Manley Performance
Part #: 39615RHXX
UPC: 807298093345

Manley Rotating Assembly, BBC 615 4.625 STROKE/4.600/+43cc

Name: Manley Rotating Assembly, BBC 615 4.625 STROKE/4.600/+43cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-615-4-625-stroke-4-600-43cc-t14-881031
Price: 4291.39 USD
Availability: BackOrder

$4291.39

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Manley Rotating Assembly, BBC 615 4.625 STROKE/4.600/+43cc. Built with forged steel and aluminum for high-horsepower BBC builds.

Key Features

This rotating assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods with 7/16? ARP 8740 cap screws, and 2618 forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins.
The 4340 forged steel crankshaft and connecting rods offer strong and reliable performance for high-horsepower applications.
The 2618 forged aluminum pistons are lightweight and strong, designed for high-RPM engine operation.
This assembly supports up to 900 horsepower with the included ARP 8740 cap screws.
An optional upgrade to ARP 2000 cap screws allows this assembly to support up to 1,500 horsepower.

This product is a universal rotating assembly and is not specific to a particular vehicle make or model. Check manufacturer specifications to ensure compatibility with your 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 includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods with 7/16? ARP 8740 cap screws, and 2618 forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins. This is a well-built package designed for serious BBC engine builds where strength and reliability are paramount.

The crankshaft and connecting rods are forged from 4340 steel, a material known for its exceptional strength and durability under high stress. This makes them a solid choice for engines that will see demanding use. The pistons are crafted from 2618 forged aluminum, which offers a good balance of strength and light weight, crucial for high-RPM performance. They come complete with premium chrome moly wrist pins for added durability.

This assembly is rated for up to 900 horsepower when using the standard ARP 8740 cap screws. If your build requires more, you have the option to upgrade to ARP 2000 cap screws, which can support up to 1,500 horsepower. Please note that this assembly is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and tuning details.