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 horsepower range increases to 1,500.

What type of pistons are included in this assembly?

This assembly includes 2618 forged aluminum Platinum Series pistons. They are designed with a -4cc flat top configuration and come with premium chrome moly wrist pins.

Specifications

Brand: Manley Performance
Part #: 290740H
UPC: 807298080208

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-t14-881282
Price: 3343.73 USD
Availability: BackOrder

$3343.73

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. Includes forged steel crank and rods, and forged aluminum pistons for a strong engine build.

Key Features

This rotating assembly includes a lightweight 4340 forged steel crankshaft.
It comes with 4340 forged steel H-beam connecting rods fitted with 7/16" ARP 8740 cap screws.
The assembly features 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
This setup is designed for a 355 cubic inch engine with a 3.480-inch stroke and -4cc flat top pistons.
The rotating assembly is rated for up to 750 horsepower with the standard ARP 8740 cap screws.
With optional ARP 2000 cap screws, the horsepower range is increased to 1,500.

This rotating assembly is designed for Small Block Chevy (SBC) engines. Please verify 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

When you're building a serious Small Block Chevy, starting with a solid rotating assembly is key. This Manley Performance rotating assembly gives you the core components needed for a robust 355 cubic inch engine with a 3.480-inch stroke. You get a lightweight 4340 forged steel crankshaft, a set of 4340 forged steel H-beam connecting rods, and 2618 forged aluminum pistons designed for a -4cc flat top configuration.

The crankshaft and connecting rods are forged from 4340 steel, a material known for its strength and durability under high stress. The H-beam connecting rods come ready for 7/16-inch ARP 8740 cap screws, with an option to upgrade to ARP 2000 fasteners for even greater strength. The included Platinum Series pistons are made from 2618 forged aluminum, a popular choice for performance applications due to its ability to withstand high temperatures and pressures. These pistons also come with premium chrome moly wrist pins.

This assembly is rated for up to 750 horsepower when using the standard ARP 8740 cap screws, and can handle up to 1,500 horsepower with the optional ARP 2000 cap screws. Please note that this assembly is not CARB approved and cannot be shipped to California. Always consult manufacturer instructions for proper installation and assembly procedures.