What material are these Manley exhaust valves made from?

These Manley Race Master exhaust valves are constructed from stainless steel. They also feature chrome-plated stems and hard tips for added durability and wear resistance.

Are these valves suitable for high-RPM engines?

Yes, these valves are designed for engines operating under 8000 RPM. They are part of Manley's Race Series, built for demanding racing applications.

What is the benefit of the swirl-polished and machined faces?

The swirl-polished under-head areas and fully machined combustion faces are designed to optimize airflow into the cylinder. This can contribute to improved combustion efficiency.

Specifications

Brand: Manley Performance
Part #: 11624-8

Manley Ford 5.0L R/M 37.5mm Race Master Exhaust Valves (Set of 8)

Name: Manley Ford 5.0L R/M 37.5mm Race Master Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-ford-5-0l-r-m-37-5mm-race-master-exhaust-valves-set-of-t14-548225
Price: 304.19 USD
Availability: BackOrder

$304.19

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Manley Ford 5.0L R/M 37.5mm Race Master Exhaust Valves (Set of 8). Well-built stainless steel valves for demanding engine builds.

Key Features

You receive a set of 8 Manley Race Master exhaust valves.
These valves are constructed from stainless steel for durability.
Chrome-plated stems and hard tips are included for improved wear resistance.
The under-head area is swirl-polished and the combustion face is fully machined to help optimize airflow.
Designed for engines operating under 8000 RPM.
Recommended for use in alcohol-fueled engines.

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About this part

Product Details

When you're rebuilding the top end of your Ford 5.0L engine, you get a set of eight Manley Race Master exhaust valves. These aren't your average valves; they're built for engines that see a lot of action, especially those running alcohol fuel, and are designed to handle up to 8000 RPM.

Each valve is made from stainless steel, which is a solid choice for durability. They also feature chrome-plated stems and hardened tips to resist wear, meaning they'll hold up better over time. The under-head area is swirl-polished and the combustion face is fully machined. This helps improve airflow into the cylinder, which can make a difference in how efficiently your engine burns fuel.

This specific set is the Race Master style, which means they have a straight stem. Manley offers these in different shapes, but the Race Master is a popular choice for many racing applications. If you're working on a performance build, especially one that uses alcohol fuel, these valves are a well-built option to consider.