What material are these Manley exhaust valves made from?

These 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 street use or only racing?

While designed for rigorous racing demands like drag, bracket, and oval track, their robust construction and materials make them a strong option for any performance-oriented engine build. They are recommended for engines operating up to 8000 RPM.

Do these valves come as a set?

Yes, these are sold as a set of 8 valves, which is the typical quantity needed for a V8 engine's exhaust valves.

Specifications

Brand: Manley Performance
Part #: 11782-8
UPC: 807298042930

Manley 68-73 Dodge 5.6L Small Block Severe Duty Exhaust Valves 2.020in Head .371in Stem (Set of 8)

Name: Manley 68-73 Dodge 5.6L Small Block Severe Duty Exhaust Valves 2.020in Head .371in Stem (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-68-73-dodge-5-6l-small-block-severe-duty-exhaust-valve-t14-81747
Price: 218.97 USD
Availability: BackOrder

$218.97

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Manley 68-73 Dodge 5.6L Small Block Severe Duty Exhaust Valves 2.020in Head .371in Stem (Set of 8). Built for high-RPM performance and durability.

Key Features

Fits 1968-1973 Dodge 5.6L Small Block engines.
Constructed from durable XH-426 stainless steel for the exhaust valves.
Features chrome-plated stems and hard tips for improved wear resistance.
Swirl polished under-head areas and fully machined combustion faces optimize airflow.
Designed for engines operating under 8000 RPM, suitable for racing applications.
Recommended for use as exhaust valves in alcohol-fueled 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

These Manley Race Series exhaust valves are built from XH-426 stainless steel, a strong material chosen for its ability to handle the heat and stress inside your engine. With a 2.020-inch head diameter and a .371-inch stem, they are designed for Dodge 5.6L small block engines from 1968-1973. They're a solid choice for engines running up to 8000 RPM, making them suitable for drag racing, bracket racing, or oval track use.

You'll find these valves feature chrome-plated stems and hardened tips, which helps them stand up to wear and tear over time. The under-head areas are swirl polished to help smooth out airflow, and the combustion faces are fully machined. This attention to detail in their construction aims to improve how efficiently your engine breathes and burns fuel. Manley also recommends these specific exhaust valves for alcohol-fueled engines, where they offer reliable performance even under demanding conditions.