What type of stainless steel are these valves made from?

These Manley Race Master exhaust valves are constructed from XH-426 stainless steel. This material is chosen for its durability and ability to withstand the high temperatures and stresses found in performance engines.

Are these valves suitable for all types of fuel?

While they are built for demanding conditions, these specific exhaust valves are recommended for use in alcohol engines. For gasoline applications, it's always best to confirm compatibility with your specific build and fuel system.

What is the difference between Race Master and Race Flo valves?

The Race Master valves, like this set (11623B-8), feature a straight stem. The Race Flo option has a different stem shape, designed for specific airflow characteristics in certain racing cylinder heads. Always choose the valve type that matches your engine's requirements.

Specifications

Brand: Manley Performance
Part #: 11623B-8
UPC: 807298073439

Manley Ford Coyote 5.0L Gen. 1/2 31mm Diameter 4.274in. Length Race Master Exhaust Valves (Set of 8)

Name: Manley Ford Coyote 5.0L Gen. 1/2 31mm Diameter 4.274in. Length Race Master Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-ford-coyote-5-0l-gen-1-2-31mm-diameter-4-274in-length--t14-500462
Price: 235.06 USD
Availability: BackOrder

$235.06

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Manley Ford Coyote 5.0L Gen. 1/2 Race Master Exhaust Valves (Set of 8). Built for high-RPM performance.

Key Features

Fits Ford Coyote 5.0L Gen 1 and Gen 2 engines.
Set includes 8 exhaust valves.
Constructed from durable XH-426 stainless steel for high-heat applications.
Chrome-plated stems and hard tips enhance longevity and wear resistance.
Swirl-polished under-head areas and fully machined combustion faces optimize airflow and combustion.
Recommended for use in alcohol-fueled engines.

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About this part

Product Details

Starting with a 31mm diameter and a 4.274-inch length, these Manley Race Master exhaust valves are built for serious performance in your Ford Coyote 5.0L Gen 1 or Gen 2 engine. They're constructed from a high-quality stainless steel, specifically the XH-426 alloy, which is known for its durability under high heat and stress. This makes them a solid choice for engines that will see a lot of track time, whether you're hitting the drag strip, an oval track, or just pushing your engine hard.

Manley didn't stop at just the material. These valves feature chrome-plated stems and hard tips to further increase their lifespan and resist wear, especially important in the harsh environment of an engine's combustion chamber. The under-head area is swirl-polished to help smooth out airflow, and the combustion face is fully machined to optimize how the air and fuel mixture burns. If you're running your Coyote on alcohol fuel, these are specifically recommended as exhaust valves, offering reliable performance even with those fuels.

This set includes eight exhaust valves, ready to be installed in your Coyote 5.0L. They are the Race Master (straight stem) configuration, designed to work with specific cylinder head setups. Remember to consult your engine's service manual or a trusted mechanic for the proper installation procedures and any other components you might need for a complete top-end rebuild.