What material are these intake valves made from?

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

What is the purpose of the swirl-polished under-head area and machined faces?

The swirl-polished under-head areas and fully machined combustion faces are designed to optimize airflow through the valve and improve combustion efficiency within the engine cylinder.

Are these valves suitable for all engine types?

Manley specifically recommends these valves for engines operating under 8000 RPM, and they are particularly noted as a good choice for alcohol engines, especially for exhaust applications.

Specifications

Brand: Manley Performance
Part #: 11382-8
UPC: 807298048994

Manley Chrysler 440-1 Indy Cylinder Heads 2.250 Dia Race Master Intake Valves (Set of 8)

Name: Manley Chrysler 440-1 Indy Cylinder Heads 2.250 Dia Race Master Intake Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-chrysler-440-1-indy-cylinder-heads-2-250-dia-race-mast-t14-4326259
Price: 218.97 USD
Availability: BackOrder

$218.97

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Manley Chrysler 440-1 Indy Heads Race Master Intake Valves (Set of 8). Stainless steel construction for durability.

Key Features

This product includes a set of eight Manley Race Master intake valves.
Each valve has a 2.250 inch diameter intake face.
Valves are constructed from stainless steel for durability.
Chrome-plated stems and hard tips are included for improved wear resistance.
The under-head areas are swirl-polished and combustion faces are fully machined to optimize airflow.
These are the straight-stem Race Master style valves.

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About this part

Product Details

This set includes eight Manley Race Master intake valves, designed for Chrysler 440-1 Indy cylinder heads. These valves are built for engines that see a lot of action, typically running up to 8000 RPM, making them a solid choice for bracket, drag, and oval track racing applications.

You're getting valves made from stainless steel, which is known for holding up well over time. They also feature chrome-plated stems and hardened tips to help them resist wear, especially in high-stress situations. The under-head area is swirl-polished and the faces are fully machined to help improve how air moves through the engine and how efficiently the fuel burns. These are the straight-stem Race Master style, which is one of the shapes Manley offers to match different engine builds.

Manley recommends these valves for use in alcohol-fueled engines, particularly for exhaust applications, to ensure they can handle the conditions. If you're rebuilding the top end of a performance Chrysler engine and need reliable intake valves, this set is a well-built option.