What material is this exhaust valve made from?

This Manley exhaust valve is constructed from stainless steel. It also features a chrome stem and a hard tip for added durability and wear resistance.

What is the purpose of the swirl polished and machined faces?

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

Is this valve suitable for all engine types?

Manley recommends these valves for engines operating under 8000 RPM, particularly for bracket, drag, and oval track racing. They are also specifically recommended as exhaust valves for alcohol engines.

Specifications

Brand: Manley Performance
Part #: 11637-1
UPC: 807298001029

Manley Ford Racing Cylinder Head 4.6L & 5.4L SOHC 36.0mm Race Master Exhaust Valve (Single)

Name: Manley Ford Racing Cylinder Head 4.6L & 5.4L SOHC 36.0mm Race Master Exhaust Valve (Single)
Brand: Manley Performance
SKU: manley-performance-manley-ford-racing-cylinder-head-4-6l-5-4l-sohc-36-0mm-race-m-t14-195598
Price: 29.39 USD
Availability: BackOrder

$29.39

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Manley Ford Racing 4.6L & 5.4L SOHC Race Master Exhaust Valve. Stainless steel construction for durability.

Key Features

This listing is for a single exhaust valve.
Constructed from stainless steel for durability.
Features a chrome stem and hard tip for enhanced wear resistance.
Swirl polished under head areas and fully machined combustion faces help optimize airflow.
Race Master (Straight Stem) shape.
Recommended for exhaust valves in alcohol engines.

⚠️ 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

This listing is for a single Manley Race Master exhaust valve. It's built from stainless steel, which is a solid choice for durability, especially for exhaust applications. The valve features a chrome stem and a hard tip, adding to its wear resistance and making it last longer. The under-head area is swirl polished and the combustion face is fully machined. This helps improve airflow and how efficiently the engine burns fuel. These are the straight stem Race Master style valves, and Manley recommends them for exhaust valves in alcohol-fueled engines.

Manley's Race Series valves are made for engines that see a lot of action, like those in bracket, drag, or oval track racing, especially if they're running under 8000 RPM. They're a well-built option if you're rebuilding the top end of your Ford 4.6L or 5.4L SOHC engine and need reliable exhaust valves.