What material are these exhaust valves made from?

These Manley exhaust valves are constructed from stainless steel, chosen for its durability. They also feature chrome-plated stems and hard tips to further enhance their resistance to wear and tear.

Are these valves suitable for high-RPM use?

Yes, the Manley Race Series valves are engineered for engines operating under 8000 RPM. Their construction and machining are intended to meet the demands of racing applications.

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

The swirl-polished under head areas and fully machined combustion faces are designed to help optimize airflow through the cylinder head. This can contribute to improved combustion efficiency and overall engine performance.

Specifications

Brand: Manley Performance
Part #: 11107-12
UPC: 807298055916

Manley 90-96 Nissan 300ZX 3.0L (VG30D - VG30DTT) DOHC 24 Exhaust 30.5mm Stainless Race Master Valves

Name: Manley 90-96 Nissan 300ZX 3.0L (VG30D - VG30DTT) DOHC 24 Exhaust 30.5mm Stainless Race Master Valves
Brand: Manley Performance
SKU: manley-performance-manley-90-96-nissan-300zx-3-0l-vg30d-vg30dtt-dohc-24-exhaust--t14-4333066
Price: 344.59 USD
Availability: BackOrder

$344.59

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Fits 1990-1996 Nissan 300ZX. Manley 30.5mm stainless steel exhaust valves for improved airflow and durability.

Key Features

Fits 1990-1996 Nissan 300ZX.
Includes a set of Manley Race Series exhaust valves.
Constructed from durable stainless steel for longevity.
Features chrome stems and hard tips for enhanced wear resistance.
Swirl-polished under head areas and fully machined combustion faces optimize airflow.
Race Master (straight stem) shape is included.

⚠️ 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 1990-1996 Nissan 300ZX, especially if you're pushing the engine hard, you'll want to make sure your exhaust valves can handle the heat and pressure. This product includes a set of Manley Race Series exhaust valves, specifically designed for engines that operate under 8000 RPM. They are a solid choice for bracket, drag, and oval track racing applications.

These exhaust valves are made from stainless steel, which is known for its durability. They feature chrome-plated stems and hardened tips to resist wear over time, helping them last longer in your engine. The valves are swirl-polished under the head and fully machined on the combustion face. This machining helps optimize airflow through the cylinder head and can contribute to better combustion efficiency. Manley offers these in a Race Master (straight stem) shape, which is what you get here, designed to work with your specific engine's requirements.

These Manley valves are also recommended for use in alcohol-fueled engines, where exhaust valves often face particularly demanding conditions. If you're working on a VG30D or VG30DTT engine and need reliable exhaust valves, these are a well-built option.