What is the horsepower rating for this rotating assembly?

With the standard 7/16? ARP 8740 cap screws, 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 materials are the crankshaft, connecting rods, and pistons made from?

The crankshaft is made from lightweight 4340 forged steel. The connecting rods are also 4340 forged steel in an H-beam design. The pistons are Manley's Platinum Series, constructed from 2618 forged aluminum.

Does this rotating assembly come with bearings and rings?

This rotating assembly includes the crankshaft, connecting rods, pistons, and wrist pins. Bearings and piston rings are typically sold separately and should be chosen based on your specific engine build requirements.

Specifications

Brand: Manley Performance
Part #: 290030H
UPC: 807298079967

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-t14-881097
Price: 3384.88 USD
Availability: BackOrder

$3384.88

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Performance is known for high-performance engine components. This SBC 383 rotating assembly is built for serious power.

Key Features

Fits Small Block Chevy (SBC) engines.
Features a 3.750 inch stroke crankshaft.
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 (optional ARP 2000 available).
Includes 2618 forged aluminum Platinum Series pistons.

This rotating assembly is designed for Small Block Chevy (SBC) engines. It is not CARB approved and cannot be shipped 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

Manley Performance has a solid reputation for building tough engine parts that can handle serious abuse. If you're looking to build a high-horsepower Small Block Chevy, this 383 stroker rotating assembly is a well-built foundation. It's designed to take your engine well beyond stock power levels.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle high RPMs. Paired with it are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16? ARP 8740 cap screws, a strong choice for many builds, but you can opt for even stronger ARP 2000 cap screws if your build demands it. The pistons are Manley's Platinum Series, made from 2618 forged aluminum and include premium chrome moly wrist pins. This combination is built to last and perform under pressure.

With the standard ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. If you step up to the optional ARP 2000 cap screws, that rating jumps to an impressive 1,500 horsepower. Keep in mind this assembly is not CARB approved and cannot be shipped to California. You'll want to ensure you have all the necessary supporting components, like bearings, rings, and a balanced rotating assembly, to complete your engine build.