What material are these exhaust valves made from?

These Manley exhaust valves are constructed from XH-426 stainless steel. They also feature chrome stems and hard tips for added durability and wear resistance.

Are these valves suitable for street use or only racing?

While designed for rigorous racing demands up to 8000 RPM, their durable construction and improved airflow characteristics can also benefit performance-oriented street engines. They are specifically recommended for alcohol engines.

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

The Race Master valves, like this part number, feature a straight stem. Race Flo valves have a different shape, often with a bent stem, designed for specific cylinder head porting and flow characteristics.

Specifications

Brand: Manley Performance
Part #: 11617-8
UPC: 807298000206

Manley Ford 4.6L DOHC (4 Valve) Triple Groove 31mm Race Master Exhaust Valves

Name: Manley Ford 4.6L DOHC (4 Valve) Triple Groove 31mm Race Master Exhaust Valves
Brand: Manley Performance
SKU: manley-performance-manley-ford-4-6l-dohc-4-valve-triple-groove-31mm-race-master--t14-4320777
Price: 235.06 USD
Availability: InStock

$235.06

Only 1 left in stock

Fits 1999-2008 Ford Mustang. Manley 4.6L DOHC (4 Valve) exhaust valves with a 31mm head, designed for high-RPM performance.

Key Features

Fits 1999-2001 and 2007-2008 Ford Mustang, and 2005-2006 Ford GT.
Manley Race Master exhaust valves feature a 31mm head diameter and straight stem.
Constructed from XH-426 stainless steel for durability in high-heat conditions.
Chrome stems and hard tips enhance wear resistance for improved longevity.
Swirl polished under-head areas and fully machined combustion faces optimize airflow.
Recommended for alcohol-fueled engines, handling demanding conditions up to 8000 RPM.

⚠️ 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 Race Master exhaust valves feature a 31mm head diameter and a triple groove stem, specifically made for Ford 4.6L DOHC (4 Valve) engines. They are built from XH-426 stainless steel, a material chosen for its strength and ability to handle the heat and stress of high-performance racing applications, especially those running alcohol fuels.

The valves are swirl polished under the head and fully machined on the combustion face. This design helps improve airflow into the cylinder and can contribute to more efficient combustion. The chrome stems and hard tips add to their longevity, resisting wear even when operating at engine speeds up to 8000 RPM. These are the straight stem, Race Master style, which are a popular choice for drag and oval track racers.

If you're rebuilding the top end of your 1999-2001 or 2007-2008 Ford Mustang's 4.6L 4-valve engine and need reliable exhaust valves for demanding conditions, these Manley valves are a solid option.