What is the horsepower rating for this rotating assembly?

With the standard 7/16-inch ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. An optional upgrade to ARP 2000 cap screws increases the rating to 1,500 horsepower.

What specific engine configuration does this assembly fit?

This rotating assembly is designed for Small Block Chevy (SBC) engines. It features a 3.480-inch stroke and -4cc flat-top pistons, resulting in a 355 cubic inch displacement.

Are there any restrictions on shipping this part?

Yes, this part is not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 290760RH
UPC: 807298080253

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-t14-881293
Price: 3463.81 USD
Availability: BackOrder

$3463.81

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 355 rotating assembly with 3.480" stroke. Features 4340 forged steel crank and rods for serious builds.

Key Features

This rotating assembly fits Small Block Chevy (SBC) engines with a 3.480-inch stroke and -4cc flat-top pistons for 355 cubic inches.
The crankshaft is constructed from lightweight 4340 forged steel for improved strength and durability.
Connecting rods are 4340 forged steel H-beam design with 7/16-inch ARP 8740 cap screws, suitable for up to 750 horsepower.
Optional ARP 2000 cap screws are available for the connecting rods, allowing for builds up to 1,500 horsepower.
Includes 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
This assembly is not CARB approved and cannot be shipped to California.

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

Built from 4340 forged steel, the crankshaft in this Manley rotating assembly is designed to handle serious power. This assembly is specifically for a Small Block Chevy (SBC) engine, featuring a 3.480-inch stroke and -4cc flat-top pistons, creating a 355 cubic inch displacement. It’s a well-built foundation for a performance engine rebuild where durability and strength are paramount.

The connecting rods are also crafted from 4340 forged steel in an H-beam design, a strong choice for high-stress applications. They come equipped with 7/16-inch ARP 8740 cap screws, which are robust enough for builds up to 750 horsepower. If your build demands even more, you have the option to upgrade to ARP 2000 cap screws, pushing the assembly's capability to an impressive 1,500 horsepower. The pistons are 2618 forged aluminum from Manley's Platinum Series, paired with premium chrome moly wrist pins for added strength and reliability under extreme conditions.

This rotating assembly is a significant step up from stock components, offering the kind of strength and precision needed for performance street or track applications. Keep in mind 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 torque specifications.