What is the horsepower rating for this rotating assembly?

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

What is the purpose of the +11cc dome on the pistons?

The +11cc dome on the pistons is designed to help achieve a specific compression ratio when paired with your chosen cylinder heads. This allows for more tuning flexibility in your engine build.

What materials are the crankshaft and connecting rods made from?

The crankshaft is constructed from lightweight 4340 forged steel for strength and reduced rotational mass. The connecting rods are also made from 4340 forged steel in an H-beam design for robust performance.

Specifications

Brand: Manley Performance
Part #: 290940RX
UPC: 807298115467

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-t14-881157
Price: 3599.08 USD
Availability: BackOrder

$3599.08

On Backorder

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Manley Rotating Assembly, SBC 383 3.750 STROKE/+11cc DOME. A well-built rotating assembly for serious engine builds.

Key Features

Fits Small Block Chevy (SBC) engines.
Features a 3.750-inch stroke for 383 cubic inch displacement.
Includes +11cc dome pistons for custom compression ratios.
Lightweight 4340 forged steel crankshaft.
4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws.
Optional ARP 2000 cap screws are available for higher horsepower applications.

This rotating assembly is designed for Small Block Chevy (SBC) 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

If you're building a high-performance Small Block Chevy engine, a strong rotating assembly is the heart of your build. This Manley rotating assembly is designed for the 383 cubic inch displacement, featuring a 3.750-inch stroke and pistons with an +11cc dome, which helps achieve a specific compression ratio depending on your cylinder heads.

At its core is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle high RPMs. Paired with this are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16-inch ARP 8740 cap screws, a solid choice for builds up to 750 horsepower. If your build demands more, you can opt for ARP 2000 cap screws, which can support up to 1,500 horsepower. The assembly also includes 2618 forged aluminum Platinum Series pistons, known for their durability and heat resistance, complete with premium chrome moly wrist pins.

This is a serious component for a serious engine project. Remember that this assembly is not CARB approved and cannot be shipped to California. Always consult your engine builder or a professional to ensure this assembly meets the specific requirements of your build.