What is the horsepower rating for this rotating assembly?

With the included 7/16-inch ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. You can upgrade to ARP 2000 series cap screws to support builds up to 1,500 horsepower.

What type of pistons are included?

This assembly includes Manley's Platinum Series pistons, which are made from 2618 forged aluminum. They are flat-top pistons with a -4cc dish and come with premium chrome moly wrist pins.

Can this rotating assembly be shipped to California?

No, this part is not CARB approved and cannot be shipped to California due to emissions regulations.

Specifications

Brand: Manley Performance
Part #: 290735R
UPC: 807298071305

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-t14-881276
Price: 3379.80 USD
Availability: BackOrder

$3379.80

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. Handles up to 750 HP with ARP 8740 bolts.

Key Features

Fits Small Block Chevy (SBC) 355 engines.
Features a 3.480-inch stroke crankshaft forged from 4340 steel.
Includes 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws.
Comes with 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins.
Rated for up to 750 horsepower with standard ARP 8740 bolts, or up to 1,500 horsepower with optional ARP 2000 cap screws.
Pistons are flat-top with a -4cc dish.

This rotating assembly is designed for Small Block Chevy (SBC) 355 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

Forged from 4340 steel, the Manley crankshaft in this rotating assembly is built to handle serious power. This particular assembly is configured for a 355 cubic inch Small Block Chevy (SBC) with a 3.480-inch stroke, designed to work with flat-top pistons that have a -4cc dish. This combination is a popular choice for builders looking to create a robust engine capable of significant performance gains.

The connecting rods are also forged from 4340 steel in an H-beam design, a strong and reliable configuration for high-stress applications. They come standard with 7/16-inch ARP 8740 cap screws, which are rated for up to 750 horsepower. If your build aims for even more power, you have the option to upgrade to ARP 2000 series cap screws, which can support up to 1,500 horsepower. The pistons are Manley's Platinum Series, made from 2618 forged aluminum, and include premium chrome moly wrist pins for durability.

This assembly is a solid foundation for a performance engine build. 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.