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 available ARP 2000 cap screws, the horsepower rating increases to 1,500.

What material are the pistons and connecting rods made from?

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

Are there any shipping restrictions for this product?

Yes, this rotating assembly is not CARB approved and therefore cannot be shipped to California.

Specifications

Brand: Manley Performance
Part #: 290940HX
UPC: 807298115443

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-t14-881153
Price: 3563.16 USD
Availability: BackOrder

$3563.16

On Backorder

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

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 with a 3.750 inch stroke and +11cc dome pistons.
Includes a lightweight 4340 forged steel crankshaft for reduced rotational mass.
Features 4340 forged steel H-beam connecting rods with 7/16? ARP 8740 cap screws, supporting up to 750 horsepower.
Optional ARP 2000 cap screws are available for the connecting rods, increasing horsepower support to 1,500.
Comes with 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
This rotating assembly is not CARB approved and cannot be shipped to California.

This rotating assembly is designed for Small Block Chevy (SBC) engines. Specific fitment details beyond engine type are not provided.

⚠️ 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 is known for making strong, reliable internal engine components for high-performance applications. This 383 cubic inch rotating assembly is a prime example, built for serious engine builders who demand durability and performance. It includes a lightweight 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods, and 2618 forged aluminum pistons, all designed to work together as a balanced unit for your SBC engine.

The 4340 forged steel crankshaft and H-beam connecting rods are incredibly strong, ready to handle significant stress. The rods come standard with 7/16? ARP 8740 cap screws, capable of supporting up to 750 horsepower. If your build demands more, you can opt for ARP 2000 cap screws, which can handle up to 1,500 horsepower, giving you a wide range of performance potential. The included 2618 forged aluminum pistons are part of Manley's Platinum Series, featuring a +11cc dome for specific compression ratios and come with premium chrome moly wrist pins for added strength and longevity.

This assembly is a solid foundation for a high-performance Small Block Chevy engine. It’s important to note that this part is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and balancing procedures to ensure optimal performance and durability.