What is the horsepower rating for this rotating assembly?

This Manley rotating assembly is rated for up to 750 horsepower when using the included ARP 8740 cap screws. For higher output builds, it can support up to 1,500 horsepower with an upgrade to optional ARP 2000 cap screws.

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

The crankshaft is constructed from lightweight 4340 forged steel. The connecting rods are also 4340 forged steel H-beams, and the pistons are 2618 forged aluminum from Manley's Platinum Series.

Does this rotating assembly come with all necessary hardware?

The assembly includes premium chrome moly wrist pins for the pistons. The connecting rods are designed to accept ARP 8740 cap screws, which are standard, or optional ARP 2000 cap screws for higher horsepower applications. You will need to source the specific ARP fasteners based on your build's requirements.

Specifications

Brand: Manley Performance
Part #: 290300RX
UPC: 807298068862

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-t14-881256
Price: 3653.68 USD
Availability: BackOrder

$3653.68

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Manley Performance SBC 434 rotating assembly with 4.000" stroke and +4cc dome pistons. Built for high-horsepower builds.

Key Features

Verified fitment for SBC 434 engines.
Features a lightweight 4340 forged steel crankshaft for strength and durability.
Includes 4340 forged steel H-beam connecting rods with provisions for ARP 8740 or optional ARP 2000 cap screws.
Comes with 2618 forged aluminum Platinum Series pistons with a +4cc dome.
Includes premium chrome moly wrist pins for the pistons.
Rated for up to 750 horsepower with ARP 8740 cap screws.

This rotating assembly is designed for SBC 434 engine applications. It is not CARB approved and cannot be shipped to California.

⚠️ 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

Manley Performance is well-known for making strong internal engine components, and this SBC 434 rotating assembly is a prime example of their commitment to performance. If you're building a serious small-block Chevy engine, this kit gives you the core components needed to achieve significant displacement and power.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft, chosen for its strength and ability to handle high RPMs and significant stress. Paired with this are 4340 forged steel H-beam connecting rods. These rods are robust 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 pistons are 2618 forged aluminum from Manley's Platinum Series, featuring a +4cc dome and coming with premium chrome moly wrist pins. This combination is designed for durability and performance, capable of handling up to 750 horsepower with the standard ARP 8740 fasteners, or an impressive 1,500 horsepower when upgraded to ARP 2000 cap screws.

This rotating assembly is a substantial upgrade for any performance-oriented small-block Chevy build. It's important to note that this assembly is not CARB approved and cannot be shipped to California. Always consult with your engine builder to ensure this assembly meets your specific project requirements and local emissions regulations.