What material are these exhaust valves made from?

These Manley exhaust valves are constructed from high-quality stainless steel, specifically an XH-426 alloy for exhaust valves. This material is chosen for its durability and resistance to heat.

Are these valves suitable for high-performance or racing applications?

Yes, these are part of Manley's Race Series, designed for engines operating under 8000 RPM. They are recommended for bracket, drag, and oval track racers, and specifically for exhaust valves in alcohol engines.

What does 'swirl polished' and 'fully machined' mean for these valves?

Swirl polishing the under-head area and fully machining the combustion face helps to smooth airflow over the valve and improve combustion efficiency. This means your engine can breathe better and burn fuel more effectively.

Specifications

Brand: Manley Performance
Part #: 11625-1

Manley Ford 5.0L DOHC (4 Valve) 31.5mm Head Diameter Triple Groove Master Exhaust Valves - Single

Name: Manley Ford 5.0L DOHC (4 Valve) 31.5mm Head Diameter Triple Groove Master Exhaust Valves - Single
Brand: Manley Performance
SKU: manley-performance-manley-ford-5-0l-dohc-4-valve-31-5mm-head-diameter-triple-gro-t14-734451
Price: 29.39 USD
Availability: BackOrder

$29.39

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Manley Performance Race Series exhaust valves for Ford 5.0L DOHC engines. Stainless steel construction for durability.

Key Features

Fits Ford 5.0L DOHC (4 Valve) engines.
31.5mm exhaust valve head diameter.
Constructed from high-quality stainless steel for durability.
Features chrome stems and hard tips for enhanced longevity and wear resistance.
Swirl polished under head areas and fully machined combustion faces optimize airflow.
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

Manley Performance is well-known for making strong internal engine components, and these Race Series exhaust valves are a prime example. If you're rebuilding the top end of a Ford 5.0L DOHC (4 valve) engine, these valves are built to handle the heat and stress of performance applications.

Constructed from high-quality stainless steel, these exhaust valves are designed for durability. They feature chrome stems and hard tips to resist wear, and the under-head areas are swirl polished while the combustion faces are fully machined. This attention to detail helps optimize airflow and combustion efficiency, which is crucial for getting the most out of your engine, especially if you're running alcohol fuel. These are the single exhaust valves, part number 11625-1.