What material are these intake valves made from?

These Manley Performance intake valves are made from NK-844 material. This material is chosen for its high tensile strength, especially at elevated temperatures like 1000°F.

What kind of testing have these valves undergone?

Manley has subjected these Severe Duty valves to rigorous fatigue testing. They have demonstrated the ability to withstand up to 100 million cycles under high stress conditions.

Are these valves suitable for stock 426 Hemi engines?

These valves are designed for high-temperature gasoline engines and have undergone severe duty testing. They are a strong choice for performance builds or engines that experience high operating temperatures.

Specifications

Brand: Manley Performance
Part #: 11904B-8
UPC: 807298066431

Manley Chrysler 426 Hemi Severe Duty Intake Valves (Set of 8)

Name: Manley Chrysler 426 Hemi Severe Duty Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-chrysler-426-hemi-severe-duty-intake-valves-set-of-8-t14-301105
Price: 349.40 USD
Availability: BackOrder

$349.40

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Manley Performance Chrysler 426 Hemi Severe Duty Intake Valves (Set of 8). Engineered for high-temperature gasoline engines.

Key Features

Fits Chrysler 426 Hemi engines.
Intake valves are constructed from NK-844 material for 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 optimize airflow.
Designed for high-temperature gasoline engine applications.
Underwent rigorous fatigue testing, enduring up to 100 million cycles.

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About this part

Product Details

If you're working on a Chrysler 426 Hemi and need a set of intake valves that can handle serious stress, these Severe Duty valves from Manley Performance are a solid option. They're built from NK-844 material, which Manley states has over four times the ultimate tensile strength of competing intake valve materials at 1000°F. This means they're designed to hold up under the demanding conditions of high-temperature gasoline engines.

These valves feature chrome stems and hard tips for added durability, and the under-head areas are swirl polished to help improve airflow into the combustion chamber. Manley has put these valves through rigorous fatigue testing, showing they can endure up to 100 million cycles under high stress, which is a notable improvement over many other valves on the market.