What material is this intake valve made from and why is it important?

This intake valve is made from NK-844 material. This material is chosen for its high tensile strength, especially at elevated temperatures, making it suitable for high-performance and high-temperature engine applications.

What does 'Severe Duty' mean for these valves?

The 'Severe Duty' designation indicates these valves have undergone rigorous fatigue testing. They are built to withstand significantly higher stress and cycles compared to standard valves, offering improved longevity in demanding engine conditions.

Are these valves sold individually or as a set?

This product listing is for a single intake valve. If you need a full set for your cylinder heads, you will need to order the appropriate quantity.

Specifications

Brand: Manley Performance
Part #: 11772-1
UPC: 807298001692

Manley Chevrolet Small Block 2.080 Head .3415 Stem Severe Duty Pro Flo Intake Valve - Single

Name: Manley Chevrolet Small Block 2.080 Head .3415 Stem Severe Duty Pro Flo Intake Valve - Single
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-small-block-2-080-head-3415-stem-severe-duty-t14-611107
Price: 43.67 USD
Availability: BackOrder

$43.67

On Backorder

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Manley Chevrolet Small Block 2.080" Head .3415" Stem Severe Duty Pro Flo Intake Valve - Single. Built with NK-844 material for high-temperature gasoline engines.

Key Features

This is a single intake valve for Chevrolet Small Block engines.
The valve head measures 2.080 inches in diameter.
The valve stem measures .3415 inches in diameter.
Constructed from NK-844 material, offering high tensile strength at elevated temperatures.
Features chrome stems and hard tips for improved durability.
Swirl polished under head areas and fully machined combustion faces help optimize airflow and combustion efficiency.

⚠️ 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

These Manley Pro Flo intake valves are made from NK-844 material, a choice that offers over four times the ultimate tensile strength of competing intake valve materials at 1000°F. This makes them a solid option for high-temperature gasoline engines, especially those built for performance or racing where valve stress can be significantly higher than in normal operation. The valves feature a 2.080-inch head diameter and a .3415-inch stem, designed to fit Chevrolet Small Block cylinder heads.

Beyond the advanced material, these valves are built for longevity and improved combustion. They incorporate chrome stems and hard tips to resist wear, and the under-head areas are swirl polished to help optimize airflow into the combustion chamber. The fully machined combustion faces ensure a consistent seal and efficient burn. Manley's Severe Duty valves have undergone rigorous fatigue testing, enduring up to 100 million cycles in tests where competitors' valves failed much sooner, indicating a significantly longer service life under demanding conditions.