What is the horsepower rating for this rotating assembly?

With the included ARP 8740 cap screws, this assembly is rated for up to 900 horsepower. If you opt for the optional ARP 2000 cap screws, it can support up to 1,500 horsepower.

Specifications

Brand: Manley Performance
Part #: 38548HX
UPC: 807298085609

Manley Rotating Assembly, BBC 548 4.250 STROKE/4.530/-20cc

Name: Manley Rotating Assembly, BBC 548 4.250 STROKE/4.530/-20cc
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-bbc-548-4-250-stroke-4-530-20cc-t14-880979
Price: 3971.17 USD
Availability: BackOrder

$3971.17

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Manley BBC 548 Rotating Assembly, 4.250" Stroke. This assembly is built to handle up to 1,500 horsepower.

Key Features

This rotating assembly includes a 4340 forged steel crankshaft.
It features 4340 forged steel H-beam connecting rods with 7/16? ARP 8740 cap screws.
The assembly includes 2618 forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins.
This BBC 548 assembly has a 4.250 inch stroke and a 4.530 inch bore.
The pistons have a -20cc dish volume.
With ARP 8740 cap screws, the assembly supports up to 900 horsepower.

This rotating assembly is designed for BBC 548ci engines with a 4.250 inch stroke and a 4.530 inch bore. It is not CARB approved and cannot ship to California.

⚠️ 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. It's designed for BBC 548ci engines with a 4.250 inch stroke and a 4.530 inch bore, featuring -20cc piston dish volume.

The crankshaft is forged from 4340 steel, offering a strong foundation for high-performance builds. The H-beam connecting rods are also forged from 4340 steel and come equipped with ARP 8740 cap screws for reliable clamping force. For those pushing the limits, optional ARP 2000 cap screws are available to support even higher horsepower levels. The Platinum Series pistons are forged from 2618 aluminum, known for its strength and thermal expansion properties, and include premium chrome moly wrist pins for durability.

With the standard ARP 8740 cap screws, this assembly is rated for up to 900 horsepower. If you opt for the ARP 2000 cap screws, the assembly can support an impressive 1,500 horsepower. Please note that this assembly is not CARB approved and cannot be shipped to California. It is important to check all manufacturer installation instructions before beginning your build.