What material are these exhaust valves made from?

These Manley Race Master 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 all types of engines?

These valves are specifically designed for high-performance applications, particularly for Ford Coyote 5.0L DOHC 4-valve engines operating under 8000 RPM. They are also recommended for exhaust valves in alcohol engines.

What is the benefit of the swirl-polished under-head area?

The swirl-polished under-head areas, along with the fully machined combustion faces, are designed to improve airflow dynamics. This can contribute to better combustion efficiency and overall engine performance.

Manley Race Master Exhaust Valves 31mm Triple Groove 11623-8

Name: Manley Ford Coyote 5.0L DOHC 4 Valve 31mm Triple Groove Race Master Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-ford-coyote-5-0l-dohc-4-valve-31mm-triple-groove-race--t14-4340917
Price: 235.06 USD
Availability: InStock

Manley Ford Coyote 5.0L DOHC 4 Valve 31mm Triple Groove Race Master Exhaust Valves (Set of 8)

$235.06

Only 4 left in stock

Manley Ford Coyote 5.0L DOHC 4 Valve 31mm Triple Groove Race Master Exhaust Valves (Set of 8). Stainless steel construction for durability.

Key Features

Fits Ford Coyote 5.0L DOHC 4-valve engines.
Set includes 8 exhaust valves.
Constructed from XH-426 stainless steel for durability.
Features chrome stems and hard tips for enhanced wear resistance.
Swirl polished under head areas and fully machined combustion faces optimize airflow.
Recommended for use in alcohol engines.

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Product Details

These Manley Race Master exhaust valves are built for serious performance, especially if you're pushing your Ford Coyote 5.0L DOHC 4-valve engine hard, like in drag or oval track racing under 8000 RPM. They're made from XH-426 stainless steel, which is a strong material that holds up well to the heat and stress of high-performance engines. The 31mm diameter is a key spec for getting the right airflow into your cylinders.

You'll notice the chrome stems and hard tips on these valves; that's a detail that adds to their longevity by resisting wear over time. Manley also swirl polishes the under-head areas and fully machines the combustion faces. This isn't just about looks; it helps improve airflow and combustion efficiency, which can make a difference in how your engine performs. These are also the recommended exhaust valves if you're running an alcohol-based fuel, as they're built to handle those conditions reliably.

This set includes eight exhaust valves, which is what you'll need for a V8 engine like the Coyote. If you're rebuilding the top end of your engine and need reliable valves that can take a beating, these are a solid option.