What material are these Manley valves made from?

These Manley Race Series valves are constructed from stainless steel. They also feature chrome stems and hard tips to further enhance their durability and wear resistance.

Are these valves suitable for high-RPM engines?

Yes, these valves are designed for engines operating under 8000 RPM. Their construction and features are intended to meet the demands of racing applications.

What makes these valves good for alcohol engines?

Manley recommends these valves for alcohol engines, especially for exhaust valve use. This recommendation is based on their reliable performance in demanding conditions often associated with alcohol fuels.

Specifications

Brand: Manley Performance
Part #: 11618B-1
UPC: 807298061207

Manley VALVE-FD 4V R/M 38mm Bead Valve Lock (Single)

Name: Manley VALVE-FD 4V R/M 38mm Bead Valve Lock (Single)
Brand: Manley Performance
SKU: manley-performance-manley-valve-fd-4v-r-m-38mm-bead-valve-lock-single-t14-402620
Price: 29.39 USD
Availability: BackOrder

$29.39

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Manley Race Series 38mm intake valve. Stainless steel construction with chrome stem and hard tip for enhanced longevity.

Key Features

This is a single Manley Race Series intake valve with a 38mm bead valve lock diameter.
Constructed from stainless steel for durability.
Features chrome stems and hard tips for improved wear resistance and longevity.
Swirl polished under head areas and fully machined combustion faces help optimize airflow and combustion efficiency.
Recommended for alcohol engines, particularly for exhaust valve applications.
Designed for engines operating under 8000 RPM.

⚠️ 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

Starting with a 38mm bead valve lock diameter, these Manley Race Series intake valves are built for engines pushing up to 8000 RPM. They're a solid choice for bracket, drag, and oval track racing applications where durability and airflow are key. The stainless steel construction means they can handle the heat and stress of performance use, while the chrome stems and hard tips add extra wear resistance, helping them last longer in demanding conditions.

Beyond just being strong, these valves are also designed to help your engine breathe better. The under-head areas are swirl polished to smooth out airflow, and the combustion faces are fully machined. This attention to detail helps optimize how air and fuel move into the cylinder and how exhaust gases get out, contributing to better combustion efficiency. If you're running an alcohol-based fuel, Manley specifically recommends these for exhaust valves due to their reliable performance in those environments.