What makes these valves 'Extreme Duty'?

The 'Extreme Duty' designation comes from their construction using Manley's XH-432 XtremeAlloy material, which is chosen for its ability to withstand extreme force and heat. They also feature chrome stems and hard tips for added durability.

What is the benefit of swirl polished under head areas and machined combustion faces?

These design features help to improve airflow into the combustion chamber and enhance combustion efficiency. This can contribute to better overall engine performance.

Are these valves sold individually or as a set?

This product listing is for the exhaust valves for your Nissan GT-R. It's important to consult the manufacturer's specifications to confirm the exact quantity included in the set for your specific engine build.

Specifications

Brand: Manley Performance
Part #: 11195-12
UPC: 807298074283

Manley Nissan GTR VR38DETT Extreme Duty Exhaust Valves

Name: Manley Nissan GTR VR38DETT Extreme Duty Exhaust Valves
Brand: Manley Performance
SKU: manley-performance-manley-nissan-gtr-vr38dett-extreme-duty-exhaust-valves-t14-204989
Price: 894.89 USD
Availability: BackOrder

$894.89

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2009-2014 Nissan GT-R. Manley Extreme Duty exhaust valves built for extreme heat and force.

Key Features

Fits 2009-2014 Nissan GT-R.
Manley Extreme Duty exhaust valves are constructed from XH-432 XtremeAlloy for extreme force and heat resistance.
Features chrome stems and hard tips for exceptional longevity and wear resistance.
Swirl polished under head areas and fully machined combustion faces improve airflow and combustion efficiency.
Designed for specialized applications where extreme force and heat resistance is a must.

⚠️ 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 has a long history of building tough engine components for racing applications. For your 2009-2014 Nissan GT-R, their Extreme Duty Series Exhaust Valves are designed to handle the intense conditions found in high-performance engines. These aren't your average valves; they're constructed using Manley's XH-432 XtremeAlloy, a material specifically chosen for its ability to withstand extreme force and heat, making them suitable for applications where reliability under pressure is critical.

You'll notice the attention to detail in their construction. These valves feature chrome stems and hard tips, which are added for exceptional longevity and wear resistance, meaning they're built to last through demanding use. The under-head areas are swirl polished, and the combustion faces are fully machined. This design work helps to improve airflow and combustion efficiency, contributing to optimized engine performance. If you're rebuilding the top end of your GT-R and need valves that can handle serious heat and stress, these are a solid option.

This set includes the exhaust valves specifically for your Nissan GT-R. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures when working on your engine.