What is the horsepower rating for this rotating assembly?

The assembly is rated for up to 900 horsepower with the standard ARP 8740 cap screws. If you choose the optional ARP 2000 cap screws, it can support up to 1,500 horsepower.

Specifications

Brand: Manley Performance
Part #: 29565RHXX
UPC: 807298087504

Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/+43cc

Name: Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/+43cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-565-4-250-stroke-4-600-43cc-t14-880935
Price: 4211.70 USD
Availability: BackOrder

$4211.70

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Manley Rotating Assembly, BBC 565 4.250 STROKE/4.600/+43cc. Includes forged steel crank, rods, and pistons for high-horsepower builds.

Key Features

This rotating assembly includes a 4340 forged steel crankshaft.
It comes with 4340 forged steel H-beam connecting rods.
The connecting rods feature 7/16? ARP 8740 cap screws, with optional ARP 2000 cap screws available.
Included are 2618 forged aluminum Platinum Series pistons.
Premium Chrome Moly wrist pins are supplied with the pistons.
The assembly supports up to 900 horsepower with ARP 8740 cap screws.

This product is a universal rotating assembly for BBC engines and does not have specific vehicle fitment listed. Please verify 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.

The crankshaft is forged from 4340 steel, a strong material known for its durability under high stress. The H-beam connecting rods are also forged from 4340 steel and come equipped with 7/16? ARP 8740 cap screws, which are a popular choice for their reliability. For those pushing the limits, optional ARP 2000 cap screws are available to handle even greater loads. The pistons are forged from 2618 aluminum, a material chosen for its strength and ability to withstand high temperatures and pressures, and they come with Premium Chrome Moly wrist pins.

This assembly is rated for up to 900 horsepower when using the standard ARP 8740 cap screws. If you opt for the ARP 2000 cap screws, the assembly is capable of handling 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 torque specifications.