What material are these exhaust valves made from?

These Manley exhaust valves are constructed from stainless steel, specifically an XH-426 alloy. This material is chosen for its durability and ability to withstand the high temperatures and stresses found in racing engines.

What is the benefit of the swirl polished and fully machined features?

The swirl polished underhead areas and fully machined combustion faces are designed to improve airflow dynamics into and out of the cylinder. This can lead to more efficient combustion and potentially better engine performance.

Are these valves suitable for all types of racing engines?

Manley's Race Series valves are engineered for engines operating under 8000 RPM, making them suitable for bracket, drag, and oval track racing. They are also specifically recommended for exhaust valves in alcohol engines.

Specifications

Brand: Manley Performance
Part #: 11644-1
UPC: 807298017945

Manley 99-10 Dodge Viper 2.020in Diameter 5.728in Length Race Master Exhaust Valve (Single)

Name: Manley 99-10 Dodge Viper 2.020in Diameter 5.728in Length Race Master Exhaust Valve (Single)
Brand: Manley Performance
SKU: manley-performance-manley-99-10-dodge-viper-2-020in-diameter-5-728in-length-race-t14-105749
Price: 28.80 USD
Availability: BackOrder

$28.80

On Backorder

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Manley 99-10 Dodge Viper Race Master Exhaust Valve. Stainless steel construction for durability.

Key Features

Fits 1999-2010 Dodge Viper.
Constructed from durable stainless steel for the exhaust side.
Features chrome stems and hard tips for improved wear resistance and longevity.
Swirl polished underhead areas and fully machined combustion faces help optimize airflow and combustion efficiency.
Race Master (straight stem) shape is suitable for many racing engine configurations.
Recommended for use 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

If you're rebuilding the top end of your 99-10 Dodge Viper engine, especially for racing applications under 8000 RPM, these Manley Race Master exhaust valves are a solid choice. They're built from stainless steel, which is key for handling the heat and stress inside the combustion chamber. The chrome stems and hard tips add extra wear resistance, meaning they'll hold up longer through many cycles.

Manley puts a lot of care into these valves. They're swirl polished under the head to help smooth out airflow, and the combustion faces are fully machined. This attention to detail helps optimize how air and fuel move through your engine and how efficiently it burns. They also offer these in a Race Flo shape if your cylinder head design calls for it, but the Race Master is a straight stem design that fits many setups. These are also recommended for exhaust valves in alcohol-fueled engines, which tells you something about their robust nature.