What material are these intake valves made from?

These intake valves are made from NK-844 material. Manley states this material offers significantly higher tensile strength at high temperatures compared to other common intake valve materials.

What is the benefit of the swirl-polished under head areas?

The swirl-polished under head areas, along with the fully machined combustion faces, are designed to improve airflow dynamics within the combustion chamber. This can contribute to better combustion efficiency.

Are these valves suitable for all engine types?

These specific intake valves are designed for high-temperature gasoline engines, particularly the Chevy LS-7 small block. It's important to confirm fitment for your specific engine application.

Specifications

Brand: Manley Performance
Part #: 11688-8
UPC: 807298066479

Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Intake Valves (Set of 8)

Name: Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-chevy-ls-7-small-block-severe-duty-pro-flo-intake-valv-t14-281044
Price: 349.40 USD
Availability: BackOrder

$349.40

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Manley LS-7 Small Block Severe Duty/Pro Flo Intake Valves (Set of 8). Built for high-temp gasoline engines with improved durability.

Key Features

Set of 8 intake valves for Chevy LS-7 small block engines.
Constructed from NK-844 material, known for high tensile strength at elevated temperatures.
Features chrome stems and hard tips for enhanced durability.
Swirl-polished under head areas and fully machined combustion faces improve airflow.
Designed for high-temperature gasoline engine applications.
Underwent rigorous fatigue testing, showing notable endurance compared to competitors.

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About this part

Product Details

Manley Performance is well-known for making strong engine components, and their Severe Duty? Valves are a prime example of that commitment. These intake valves are specifically made for Chevy LS-7 small block engines, designed to handle the demands of high-temperature gasoline applications. If you're rebuilding the top end of your LS-7, these valves offer a well-built option that stands up to rigorous use.

What sets these valves apart is the material: they're crafted from NK-844, a material Manley states has over four times the ultimate tensile strength of competing intake valve materials at 1000?F. They also feature chrome stems and hard tips for added durability, along with swirl-polished under-head areas and fully machined combustion faces. This design helps improve airflow and combustion efficiency, making them a solid choice for performance builds.

This set includes eight intake valves, enough for a complete engine. For optimal performance and longevity, always refer to the manufacturer's installation instructions and ensure proper valve seating during assembly.