What material are these exhaust valves made from?

These Manley exhaust valves are constructed from stainless steel, specifically XH-426. They also feature chrome-plated stems and hard tips for added durability and wear resistance.

Are these valves suitable for a street-driven car or only for racing?

Manley Race Series valves are engineered for the demands of racing, operating under 8000 RPM. While they can be used in a street application, their design is optimized for higher-stress environments like drag or oval track racing.

What is the difference between Race Master and Race Flo valves?

The Race Master valves, like this part number, feature a straight stem. Race Flo valves have a different shape designed to optimize airflow in specific racing engine configurations. This product is the Race Master version.

Specifications

Brand: Manley Performance
Part #: 11105-12
UPC: 807298055879

Manley 90-96 Nissan 300ZX 3.0L (VG30D - VG30DTT) DOHC 24 Exhaust 29.5mm Stainless Race Master Valves

Name: Manley 90-96 Nissan 300ZX 3.0L (VG30D - VG30DTT) DOHC 24 Exhaust 29.5mm Stainless Race Master Valves
Brand: Manley Performance
SKU: manley-performance-manley-90-96-nissan-300zx-3-0l-vg30d-vg30dtt-dohc-24-exhaust--t14-4386381
Price: 344.59 USD
Availability: BackOrder

$344.59

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Fits 1990-1996 Nissan 300ZX. Manley Race Master exhaust valves are well-built from stainless steel for improved durability in high-RPM engines.

Key Features

Fits 1990-1996 Nissan 300ZX.
Manley Race Series valves are built for engines operating under 8000 RPM.
Constructed from stainless steel for strong durability.
Features chrome stems and hard tips for improved wear resistance.
Swirl polished under head areas and fully machined combustion faces help optimize airflow.
Race Master (Straight Stem) shape is suitable for specific racing engine builds.

⚠️ 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 1990-1996 Nissan 300ZX, especially for racing applications, these Manley Race Master exhaust valves are a solid option. They're designed to handle the heat and stress that come with engines running up to 8000 RPM, making them a good choice for drag or oval track use.

These valves are made from stainless steel, which is a strong material that holds up well over time. They also feature chrome-plated stems and hardened tips to resist wear, especially where the valve seals and guides make contact. The swirl-polished under-head area and machined combustion face help improve airflow into the cylinder, which can make a difference in how efficiently your engine runs.

Manley offers these in a Race Master straight stem design, which is what you'll find here. They're also recommended for use in engines running on alcohol fuels, as they can better withstand the conditions associated with those fuels.