What is the horsepower rating for this rotating assembly?

With the standard 7/16" ARP 8740 cap screws on the connecting rods, this assembly is rated for up to 750 horsepower. An optional upgrade to ARP 2000 cap screws increases the horsepower support to 1,500.

What compression ratio can I expect with these pistons?

The pistons feature a -15cc dish volume. The final compression ratio will depend on the bore size, piston deck height, and the combustion chamber volume of the cylinder heads you choose for your build.

Are any other components needed to complete this rotating assembly?

Yes, this is a core rotating assembly. You will need to source compatible engine bearings, piston rings, and potentially other internal engine components like a harmonic balancer and flexplate or flywheel to complete the installation.

Specifications

Brand: Manley Performance
Part #: 290035RX
UPC: 807298115054

Manley Rotating Assembly, SBC 383 3.750 STROKE/-15cc DISH

Name: Manley Rotating Assembly, SBC 383 3.750 STROKE/-15cc DISH
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-383-3-750-stroke-15cc-dish-t14-881109
Price: 3438.08 USD
Availability: BackOrder

$3438.08

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Manley Performance SBC 383 rotating assembly with 3.750" stroke. Features 4340 forged steel crank and rods for serious builds.

Key Features

Fits Small Block Chevy (SBC) engines.
3.750 inch stroke length.
Features -15cc dish volume pistons.
Includes a lightweight 4340 forged steel crankshaft.
Comes with 4340 forged steel H-beam connecting rods.
Connecting rods are equipped with 7/16" ARP 8740 cap screws, supporting up to 750 horsepower.

This rotating assembly is designed for Small Block Chevy (SBC) engines. Specific vehicle fitment depends on the engine block and other components used in your 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, this Manley rotating assembly is a solid foundation. It's designed for a 383 cubic inch displacement with a 3.750-inch stroke, and the pistons are dished to a -15cc volume, which helps achieve a specific compression ratio when paired with your chosen cylinder heads. This isn't just a collection of parts; it's a matched set engineered to work together for maximum power and reliability in demanding applications.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle significant stress. Connecting to the crank are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16" ARP 8740 cap screws, a well-known name in high-strength fasteners, capable of handling up to 750 horsepower. For those pushing the limits even further, there's an option to upgrade to ARP 2000 cap screws, which can support up to 1,500 horsepower. The pistons are made from 2618 forged aluminum, a material known for its durability and thermal stability under high loads, and they include premium chrome moly wrist pins for added strength.

This assembly is a serious investment for a serious engine build. Keep in mind that this kit is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed specifications and installation instructions to ensure proper assembly and to select compatible components like bearings, rings, and gaskets for your specific build.