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 rating increases to 1,500 horsepower.

What materials are the crankshaft, connecting rods, and pistons made from?

The crankshaft is made from lightweight 4340 forged steel. The connecting rods are also 4340 forged steel H-beams, and the pistons are 2618 forged aluminum.

Are there any restrictions on shipping this product?

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

Specifications

Brand: Manley Performance
Part #: 290760R
UPC: 807298080246

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-t14-881292
Price: 3379.80 USD
Availability: BackOrder

$3379.80

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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

This rotating assembly is verified to fit Small Block Chevy (SBC) 355 cubic inch engines with a 3.480 inch stroke and -4cc flat top pistons.
Features a lightweight 4340 forged steel crankshaft for strength and reduced rotational mass.
Includes 4340 forged steel H-beam connecting rods equipped with 7/16? ARP 8740 cap screws.
Optional ARP 2000 cap screws are available for the connecting rods, increasing the horsepower rating.
Comes with 2618 forged aluminum Platinum Series pistons that include Premium Chrome Moly wrist pins.
Rated for up to 750 horsepower with the standard ARP 8740 cap screws.

This rotating assembly is designed for Small Block Chevy (SBC) 355 cubic inch engines with a 3.480 inch stroke and -4cc flat top pistons. Always confirm compatibility with your specific engine block and other components.

⚠️ 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 Manley rotating assembly starts with a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle significant stress. It's paired with 4340 forged steel H-beam connecting rods, which are a well-built choice for performance applications. These rods come standard with 7/16? ARP 8740 cap screws, but you can opt for ARP 2000 cap screws for even greater strength if your build demands it.

The pistons are Manley's Platinum Series, made from 2618 forged aluminum and include Premium Chrome Moly wrist pins. This combination is designed to handle the rigors of a performance engine. With the standard ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. If you upgrade to the optional ARP 2000 cap screws, the assembly is capable of handling an impressive 1,500 horsepower, making it suitable for serious engine builds.

Please note that this assembly is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's detailed specifications for installation and compatibility with your specific engine block and components.