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. If you opt for the ARP 2000 cap screws, the horsepower support increases to 1,500 HP.

What type of pistons are included in this assembly?

This assembly includes Manley's 2618 forged aluminum Platinum Series pistons. They are flat-top pistons with a -4cc volume, designed to work with specific cylinder heads for optimal compression.

Does this rotating assembly come balanced?

Rotating assemblies typically require balancing by a professional engine builder to match the specific components used in your build, including the flywheel and harmonic balancer. Refer to the manufacturer's instructions for balancing recommendations.

Specifications

Brand: Manley Performance
Part #: 290730HX
UPC: 807298115122

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-t14-881267
Price: 3360.84 USD
Availability: BackOrder

$3360.84

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) engines.
Features a lightweight 4340 forged steel crankshaft with a 3.480-inch stroke.
Includes 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws, supporting up to 750 horsepower.
Optional ARP 2000 cap screws are available for connecting rods, allowing support for up to 1,500 horsepower.
Comes with 2618 forged aluminum Platinum Series pistons with a flat-top design (-4cc volume).
Includes premium chrome moly wrist pins for enhanced durability.

This rotating assembly is designed for Small Block Chevy (SBC) engines. Always consult manufacturer specifications for compatibility with specific engine blocks and 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

If you're building a high-performance Small Block Chevy engine and need a solid foundation, this Manley rotating assembly is a strong contender. It's designed to handle serious power, giving you the confidence to push your engine's limits. This assembly includes a crankshaft, connecting rods, and pistons, all engineered to work together seamlessly for optimal performance and durability.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft with a 3.480-inch stroke, providing the displacement for a 355 cubic inch engine. Paired with this are 4340 forged steel H-beam connecting rods. These rods come standard with 7/16-inch ARP 8740 cap screws, capable of handling up to 750 horsepower. For those aiming for even higher power levels, optional ARP 2000 cap screws are available, allowing this assembly to support up to 1,500 horsepower. The pistons are Manley's 2618 forged aluminum Platinum Series, featuring a flat-top design with -4cc volume, perfect for achieving a desired compression ratio with specific cylinder heads. They also include premium chrome moly wrist pins for added strength.

This rotating assembly is a well-built package for serious engine builders. Keep in mind that this assembly is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper assembly and balancing procedures to ensure the longevity and performance of your new engine.