What is the maximum horsepower this rotating assembly can handle?

With the included ARP 8740 cap screws, this assembly is rated for up to 750 horsepower. If you opt for the ARP 2000 cap screws, the assembly can support up to 1,500 horsepower.

What are the key components included in this rotating assembly?

This assembly includes a 4340 forged steel crankshaft, 4340 forged steel H-beam connecting rods, and 2618 forged aluminum Platinum Series pistons with Premium Chrome Moly wrist pins.

Specifications

Brand: Manley Performance
Part #: 290330RHX
UPC: 807298068817

Manley Rotating Assembly, SBC 434 4.000 STROKE/+4cc DOME

Name: Manley Rotating Assembly, SBC 434 4.000 STROKE/+4cc DOME
Brand: Manley Performance
SKU: manley-performance-manley-rotating-assembly-sbc-434-4-000-stroke-4cc-dome-t14-881263
Price: 3735.44 USD
Availability: BackOrder

$3735.44

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 434 4.000 STROKE/+4cc DOME. For serious engine builds needing a strong foundation.

Key Features

Fits Small Block Chevy (SBC) engines.
Features a 434 cubic inch displacement with a 4.000-inch stroke.
Includes a lightweight 4340 forged steel crankshaft for strength and durability.
Comes with 4340 forged steel H-beam connecting rods ready for ARP 8740 or optional ARP 2000 cap screws.
Equipped with 2618 forged aluminum Platinum Series pistons and Premium Chrome Moly wrist pins.
Supports horsepower ranges from 750 HP (with ARP 8740) to 1,500 HP (with optional ARP 2000 cap screws).

This rotating assembly is designed for Small Block Chevy (SBC) engines. Please consult with a professional or refer to manufacturer specifications to ensure compatibility with your specific engine build and supporting 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 aiming for serious power, a well-matched rotating assembly is the heart of your build. This Manley Performance rotating assembly is designed to handle significant output, giving you a solid foundation for a 434 cubic inch engine with a 4.000-inch stroke. It's a popular choice for those looking to push the limits of their SBC.

At its core is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to withstand high RPMs and increased cylinder pressures. Paired with this are 4340 forged steel H-beam connecting rods. These rods are known for their robust construction and come ready to accept either ARP 8740 or optional ARP 2000 cap screws, allowing you to tailor the rod's strength to your horsepower goals. The assembly also includes 2618 forged aluminum Platinum Series pistons, which are lightweight and durable, featuring Premium Chrome Moly wrist pins for added reliability. This combination is engineered to support horsepower ranges from 750 with the standard ARP 8740 bolts up to an impressive 1,500 horsepower when using the optional ARP 2000 cap screws.

This Manley rotating assembly is a significant step up for a performance engine build. It’s important to note that this assembly is not CARB approved and cannot be shipped to California. Ensure you have the necessary supporting components and machining services to properly install this high-performance rotating assembly.