What is the horsepower rating for this rotating assembly?

This Manley rotating assembly is rated for up to 750 horsepower when using the included ARP 8740 cap screws. If you upgrade to optional ARP 2000 cap screws, the assembly is capable of handling up to 1,500 horsepower.

What material are the crankshaft and connecting rods made from?

The crankshaft and the H-beam connecting rods in this kit are both constructed from 4340 forged steel. This material is chosen for its strength and durability under high stress and RPM conditions.

Does this kit include everything needed for installation?

This kit includes the crankshaft, connecting rods, pistons, and wrist pins. It is recommended to consult the manufacturer's installation guide for a complete list of required hardware, bearings, and assembly procedures, as these are typically sold separately.

Specifications

Brand: Manley Performance
Part #: 290130X
UPC: 807298114989

Manley Rotating Assembly, SBC 383 3.750 STROKE/-4cc FLAT

Name: Manley Rotating Assembly, SBC 383 3.750 STROKE/-4cc FLAT
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-383-3-750-stroke-4cc-flat-t14-881233
Price: 3318.00 USD
Availability: BackOrder

$3318.00

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, 4340 forged steel crank and rods, forged aluminum pistons.

Key Features

Fits Small Block Chevrolet (SBC) engines.
383 cubic inch displacement with a 3.750-inch stroke.
Includes lightweight 4340 forged steel crankshaft.
Features 4340 forged steel H-beam connecting rods.
Comes with 2618 forged aluminum Platinum Series pistons.
Includes premium chrome moly wrist pins.

This rotating assembly is designed for Small Block Chevrolet (SBC) engines. Always consult 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

This is a Manley Performance rotating assembly kit for a Small Block Chevrolet (SBC) engine, built to a 383 cubic inch displacement with a 3.750-inch stroke and -4cc flat-top pistons. If you're looking to build a serious performance engine, a well-matched rotating assembly like this is the foundation. It includes all the core components that spin inside your engine block, ensuring they work together harmoniously for power and durability.

At the heart of this kit is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle high RPMs and significant stress. Paired with it are 4340 forged steel H-beam connecting rods. These rods are robust and come ready for either ARP 8740 or optional ARP 2000 cap screws, giving you flexibility depending on your horsepower goals. The pistons are Manley's Platinum Series, made from 2618 forged aluminum, which is known for its excellent strength-to-weight ratio. They also include premium chrome moly wrist pins, a strong choice for performance applications. This assembly is rated for up to 750 horsepower with the standard ARP 8740 fasteners, and can handle up to 1,500 horsepower if you opt for the ARP 2000 cap screws.

When building a performance engine, getting the rotating assembly right from the start is crucial. This Manley kit offers a well-matched set of components from a reputable manufacturer. Please note that this assembly is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed installation instructions for proper assembly and torque specifications.