What components are included in this Manley rotating assembly?

This 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.

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

Specifications

Brand: Manley Performance
Part #: 28548RHX
UPC: 807298089539

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-t14-880915
Price: 4001.83 USD
Availability: BackOrder

$4001.83

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Manley Rotating Assembly, BBC 548 4.250 STROKE/4.530/-20cc. This assembly supports up to 1500 HP.

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 is built for strength and durability under high loads.
The 4340 forged steel H-beam connecting rods are designed to handle significant stress.
The pistons are Manley's Platinum Series, constructed from 2618 forged aluminum for a good balance of strength and weight.
This assembly is rated for up to 900 horsepower when using the included ARP 8740 cap screws.
With optional ARP 2000 cap screws, this rotating assembly can support up to 1,500 horsepower.

This product is a specific rotating assembly for BBC engines with a 548 cubic inch displacement, 4.250 inch stroke, and 4.530 inch bore. 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

When you're building a serious BBC engine, starting with a well-built rotating assembly is key. This Manley Performance rotating assembly is designed for the 548 cubic inch BBC, featuring a 4.250 inch stroke and a 4.530 inch bore with a -20cc piston dish. What you get in this package is a forged steel crankshaft, forged H-beam connecting rods, and forged aluminum pistons. This is a complete package to get your engine's bottom end sorted.

The crankshaft is made from 4340 forged steel, which is a strong material chosen for its ability to handle high stress. The connecting rods are also 4340 forged steel H-beams, and they come equipped with 7/16? ARP 8740 cap screws. If you're looking to push the limits, you can opt for ARP 2000 cap screws, which are rated for even higher horsepower. The pistons are Manley's Platinum Series, made from 2618 forged aluminum and include Premium Chrome Moly wrist pins. This combination is built to handle significant power. With the standard ARP 8740 bolts, this assembly is rated for up to 900 horsepower, and with the optional ARP 2000 bolts, it's capable of handling up to 1,500 horsepower. This makes it a solid choice for high-performance street or race applications.

Keep in mind that this assembly is not CARB approved and cannot be shipped to California. It's always a good idea to consult with your engine builder to ensure this rotating assembly meets the specific requirements of your build.