What material are these Manley exhaust valves made from?

These Manley Race Series exhaust valves are constructed from XH-426 stainless steel. This material is chosen for its durability and resistance to corrosion, especially under the high temperatures found in performance engines.

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

The swirl polishing under the head and the fully machined combustion faces are designed to improve airflow into the cylinder. This can help optimize combustion efficiency and contribute to better engine performance.

Are these valves suitable for street use or only racing?

Manley's Race Series valves are meticulously engineered for the rigorous demands of racing, including bracket, drag, and oval track applications, especially for engines operating under 8000 RPM. While durable, they are optimized for performance conditions.

Specifications

Brand: Manley Performance
Part #: 11165-12
UPC: 807298002156

Manley Nissan 2.6L Inline 6-24 Valve RB26DET/T 31.15mm Stainless Race Flo Exhaust Valves

Name: Manley Nissan 2.6L Inline 6-24 Valve RB26DET/T 31.15mm Stainless Race Flo Exhaust Valves
Brand: Manley Performance
SKU: manley-performance-manley-nissan-2-6l-inline-6-24-valve-rb26det-t-31-15mm-stainl-t14-254346
Price: 488.42 USD
Availability: BackOrder

$488.42

On Backorder

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Manley Nissan RB26DET/T 2.6L 31.15mm Stainless Race Flo Exhaust Valves. Built for high-RPM performance and durability.

Key Features

You receive 12 exhaust valves for your Nissan RB26DET/T engine.
Each valve measures 31.15mm and is made from XH-426 stainless steel for durability.
Chrome stems and hard tips are included to improve wear resistance and longevity.
The under-head areas are swirl polished and combustion faces are fully machined to help optimize airflow.
These valves feature the Race Flo shape, suitable for specific racing engine configurations.
They are recommended for use in alcohol engines, offering reliable performance.

⚠️ 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

When you're rebuilding the top end of your Nissan RB26DET/T engine, especially for racing applications, you need parts that can handle the stress. This set of Manley Race Series exhaust valves is built for just that. You get 12 exhaust valves, each measuring 31.15mm, crafted from XH-426 stainless steel for solid durability under high heat and pressure.

These aren't just basic valves; they're designed to help your engine breathe better and last longer. The stainless steel construction resists corrosion, while the chrome stems and hard tips add extra wear resistance where it counts. Manley also swirl polishes the under-head areas and fully machines the combustion faces. This helps improve airflow into the cylinder and can contribute to better combustion efficiency, which is key for making power, especially if you're running alcohol fuel. The Race Flo shape is a specific design choice for certain racing engine builds.

If you're pushing your RB26DET/T past 8000 RPM or using alcohol-based fuels, these valves are a well-built option to consider for your engine build. They are designed to be a direct replacement for your stock exhaust valves, fitting right into your cylinder head.