What material are these Manley intake valves made from?

These intake valves are constructed from high-quality stainless steel. They also feature chrome stems and hard tips for improved longevity and wear resistance.

What is the purpose of the swirl polished and fully machined features?

The swirl polished under-head areas and fully machined combustion faces are designed to optimize airflow into the combustion chamber. This can contribute to improved combustion efficiency in your engine.

Are these valves suitable for alcohol-fueled engines?

While these are intake valves, Manley recommends their specific exhaust valves for alcohol engines due to the demanding conditions. These intake valves are designed for general racing applications under 8000 RPM.

Specifications

Brand: Manley Performance
Part #: 11658-4
UPC: 807298056623

Manley VW Type IV Single Groove 48mm Race Master Intake Valves (Set of 4)

Name: Manley VW Type IV Single Groove 48mm Race Master Intake Valves (Set of 4)
Brand: Manley Performance
SKU: manley-performance-manley-vw-type-iv-single-groove-48mm-race-master-intake-valve-t14-306854
Price: 109.49 USD
Availability: BackOrder

$109.49

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Manley VW Type IV Race Master Intake Valves (Set of 4). Stainless steel construction for durability.

Key Features

Fits VW Type IV engines.
Set of 4 intake valves.
48mm head diameter.
Race Master (straight stem) design.
Constructed from stainless steel for durability.
Chrome stems and hard tips enhance wear resistance.

⚠️ 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 Race Master Intake Valves are built for VW Type IV engines, specifically for racing applications under 8000 RPM. These intake valves feature a 48mm head diameter and a straight stem design, making them a solid choice for bracket, drag, and oval track racing.

Constructed from high-quality stainless steel, these valves are designed for durability. The stems are chrome-plated and feature hard tips to improve wear resistance over time. The under-head areas are swirl polished and the combustion faces are fully machined. This attention to detail helps optimize airflow into the combustion chamber, contributing to better engine efficiency.

This set includes four intake valves. If you're rebuilding the top end of your VW Type IV for racing, these valves are a well-built component to consider.