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

What is the difference between ARP 8740 and ARP 2000 cap screws?

ARP 8740 cap screws are a strong, reliable choice for many performance builds. ARP 2000 cap screws offer a higher tensile strength and are recommended for applications demanding maximum reliability at higher horsepower levels, such as those exceeding 750 HP.

Specifications

Brand: Manley Performance
Part #: 290030HX
UPC: 807298115115

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-t14-881098
Price: 3402.01 USD
Availability: BackOrder

$3402.01

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 SBC 383 rotating assembly, 3.750 stroke. Built for up to 1500 HP.

Key Features

Fits Small Block Chevy (SBC) 383 engines with a 3.750-inch stroke and -15cc dish pistons.
Features a lightweight 4340 forged steel crankshaft for strength and durability.
Includes 4340 forged steel H-beam connecting rods with 7/16? ARP 8740 cap screws.
Optional ARP 2000 cap screws are available for increased connecting rod strength.
2618 forged aluminum Platinum Series pistons are included, along with premium chrome moly wrist pins.
Rated for up to 750 horsepower with standard ARP 8740 bolts.

This rotating assembly is designed for Small Block Chevy (SBC) 383 engines. Please verify compatibility with your specific engine block and configuration.

⚠️ 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

This Manley Performance rotating assembly is built for a Small Block Chevy (SBC) 383 cubic inch engine, featuring a 3.750-inch stroke and -15cc dish pistons. It’s a well-built foundation for a serious engine build, designed to handle significant power levels. Whether you're building a street-strip machine or a dedicated race engine, a strong rotating assembly is crucial for reliability and performance.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to withstand high RPMs and stress. Paired with it are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16? ARP 8740 cap screws, a solid choice for many performance applications. For those pushing the limits, there's an option to upgrade to ARP 2000 cap screws, significantly increasing the rod's load-carrying capacity.

The pistons are 2618 forged aluminum from Manley's Platinum Series, complete with premium chrome moly wrist pins. This combination offers excellent strength and durability. With the standard ARP 8740 bolts, this assembly is rated for up to 750 horsepower. Opting for the ARP 2000 cap screws raises that capability to an impressive 1,500 horsepower, making this a versatile choice for a wide range of performance goals. Please note this assembly is not CARB approved and cannot be shipped to California.