What is the horsepower rating for this rotating assembly?

With the standard ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. If you opt for the upgrade to ARP 2000 cap screws, the rating increases to 1,500 horsepower.

What materials are the crankshaft, rods, and pistons made from?

The crankshaft and connecting rods are constructed from lightweight 4340 forged steel. The pistons are made from 2618 forged aluminum, a strong and heat-resistant material.

Specifications

Brand: Manley Performance
Part #: 290960H
UPC: 807298112978

Manley Rotating Assembly, SBC 383 3.750 STROKE/+11cc DOME

Name: Manley Rotating Assembly, SBC 383 3.750 STROKE/+11cc DOME
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-383-3-750-stroke-11cc-dome-t14-881160
Price: 3545.89 USD
Availability: BackOrder

$3545.89

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Manley Rotating Assembly, SBC 383 3.750 STROKE/+11cc DOME. Built with 4340 forged steel and 2618 aluminum for high-horsepower builds.

Key Features

Fits SBC engines with a 3.750 inch stroke and +11cc dome pistons.
Features a lightweight 4340 forged steel crankshaft for reduced rotational mass.
Includes 4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws.
Comes with 2618 forged aluminum Platinum Series pistons, suitable for high-horsepower applications.
Includes Premium Chrome Moly wrist pins for added durability.
Rated for up to 750 horsepower with standard ARP 8740 cap screws.

This rotating assembly is designed for SBC engines. Please consult with a professional to confirm compatibility with your specific engine build and application.

⚠️ 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

Starting with a lightweight 4340 forged steel crankshaft is key for a robust rotating assembly. This Manley unit features a 3.750-inch stroke, designed for SBC 383 cubic inch applications. The +11cc dome pistons are forged from 2618 aluminum, a material known for its strength and ability to handle high temperatures, making them a solid choice for performance builds.

Complementing the crankshaft are 4340 forged steel H-beam connecting rods. These rods come equipped with 7/16-inch ARP 8740 cap screws, a well-regarded fastener for performance engines. For those pushing the limits, there's an option to upgrade to ARP 2000 cap screws, which significantly increases the rod's horsepower handling capability. The included Premium Chrome Moly wrist pins are also forged, ensuring durability under stress.

This assembly is rated for up to 750 horsepower with the standard ARP 8740 fasteners, and can handle an impressive 1,500 horsepower when upgraded to ARP 2000 cap screws. It's important to note that this assembly is not CARB approved and cannot be shipped to California. Proper installation and balancing by a qualified professional are recommended for optimal performance and longevity.