What is the horsepower rating for this rotating assembly?

This Manley rotating assembly is rated for 750 horsepower with the included ARP 8740 cap screws. For builds aiming for higher power, it can handle up to 1,500 horsepower with optional ARP 2000 cap screws.

What materials are the main components made from?

The crankshaft is forged from 4340 steel, the connecting rods are Pro Series Lightweight I-Beam forged steel, and the pistons are 2618 forged aluminum. The wrist pins are Premium Chrome Moly.

Is this rotating assembly balanced?

Rotating assemblies typically require balancing by a professional engine builder to match specific components like the flywheel and harmonic balancer. Refer to Manley's installation instructions for balancing recommendations.

Specifications

Brand: Manley Performance
Part #: 290835H
UPC: 807298080277

Manley Rotating Assembly, SBC 355 3.480 STROKE/-4cc FLAT

Name: Manley Rotating Assembly, SBC 355 3.480 STROKE/-4cc FLAT
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-355-3-480-stroke-4cc-flat-t14-881302
Price: 4619.48 USD
Availability: BackOrder

$4619.48

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 355 3.480 STROKE/-4cc FLAT. Built for high-horsepower builds.

Key Features

Fits Small Block Chevy (SBC) 355ci engines.
Features a lightweight 4340 forged steel crankshaft for strength and reduced rotational mass.
Includes Pro Series Lightweight I-Beam connecting rods with 7/16? ARP 2000 cap screws.
Comes with 2618 forged aluminum Platinum Series pistons.
Includes Premium Chrome Moly wrist pins for added durability.
Rated for 750 horsepower with standard ARP 8740 cap screws.

This rotating assembly is designed for Small Block Chevy (SBC) 355ci 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 is well-known for making strong internal engine components, and this rotating assembly for a Small Block Chevy (SBC) 355ci is a prime example of their commitment to performance. If you're building a serious engine for your project, this kit gives you the core components to get started. It includes a lightweight 4340 forged steel crankshaft, Pro Series Lightweight I-Beam connecting rods with ARP 2000 cap screws, and 2618 forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins. This combination is designed to handle significant power.

The crankshaft is forged from 4340 steel, a material chosen for its strength and ability to withstand the stresses of high-RPM operation. Paired with the Pro Series I-Beam rods, which are also forged for durability, this assembly is built to last. The Platinum Series pistons are made from 2618 forged aluminum, a common choice for high-performance applications due to its thermal expansion properties and strength. The included wrist pins are Premium Chrome Moly, adding another layer of robustness to the piston assembly. This setup is rated for up to 750 horsepower with the standard ARP 8740 cap screws, and can be upgraded to handle 1,500 horsepower with optional ARP 2000 cap screws, giving you a clear path for increased power goals.

When assembling an engine of this caliber, attention to detail is crucial. Ensure all components are properly balanced and clearances are set according to Manley's specifications. This rotating assembly is a solid foundation for a performance SBC build, whether for street, strip, or track use. Please note that this part is not CARB approved and cannot be shipped to California.