What is the horsepower rating for this rotating assembly?

With the standard 7/16? 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 they come with Premium Chrome Moly wrist pins.

Specifications

Brand: Manley Performance
Part #: 39615HXX
UPC: 807298093307

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-t14-881028
Price: 4181.04 USD
Availability: BackOrder

$4181.04

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

Key Features

This rotating assembly features a 4340 forged steel crankshaft for robust performance.
It includes 4340 forged steel H-beam connecting rods equipped with 7/16? ARP 8740 cap screws.
Optional ARP 2000 cap screws are available for increased rod strength.
The assembly uses 2618 forged aluminum Platinum Series pistons.
Premium Chrome Moly wrist pins are included with the pistons.
Rated for up to 900 horsepower with ARP 8740 cap screws.

This is a universal rotating assembly for BBC 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

This Manley rotating assembly starts with a 4340 forged steel crankshaft, chosen for its strength and ability to handle significant stress. It’s paired with 4340 forged steel H-beam connecting rods, which are a well-known strong choice for performance applications. These rods come standard with 7/16? ARP 8740 cap screws, but you can opt for ARP 2000 cap screws for even more strength if your build demands it.

The pistons in this assembly are Manley's Platinum Series, made from 2618 forged aluminum. This material is selected for its durability and ability to withstand high temperatures and pressures. They also include Premium Chrome Moly wrist pins, which are known for their toughness. This combination is designed to handle serious power; with the standard ARP 8740 bolts, it's rated for up to 900 horsepower, and with the optional ARP 2000 bolts, it can handle up to 1,500 horsepower. This makes it a solid foundation for a high-performance Big Block Chevy engine.

Keep in mind that this assembly is not CARB approved and cannot be shipped to California. It's a substantial component for a serious engine build, and it's important to ensure all other engine components are matched to its capabilities for optimal performance and reliability.