What material are these Manley intake valves made from?

These intake valves are constructed from stainless steel, which offers good durability. They also feature chrome-plated stems and hardened tips to further improve their resistance to wear.

Are these valves suitable for high-RPM use?

Yes, Manley's Race Series valves are engineered for engines operating under 8000 RPM, making them suitable for bracket, drag, and oval track racing applications.

What is the difference between Race Master and Race Flo valve shapes?

The Race Master valves have a straight stem, while the Race Flo valves feature a different shape. You would choose based on the specific requirements of your racing engine's cylinder head design.

Specifications

Brand: Manley Performance
Part #: 11636-8
UPC: 807298001197

Manley Ford 4.6L & 5.4L SOHC 44.5mm Race Master Intake Valves Set of 8

Name: Manley Ford 4.6L & 5.4L SOHC 44.5mm Race Master Intake Valves *Set of 8*
Brand: Manley Performance
SKU: manley-performance-manley-ford-4-6l-5-4l-sohc-44-5mm-race-master-intake-valves-s-t14-4387841
Price: 235.06 USD
Availability: BackOrder

$235.06

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1999-2004 Ford Mustang. Manley 44.5mm Race Master intake valves (set of 8) for 4.6L & 5.4L SOHC engines. Optimized for airflow.

Key Features

Fits 1999-2004 Ford Mustang, 1999-2000 Ford F-150 with 4.6L and 5.4L SOHC engines.
Set of 8 Manley Race Master intake valves with 44.5mm heads.
Constructed from stainless steel for improved durability.
Features chrome-plated stems and hardened tips for enhanced wear resistance.
Swirl-polished under-head areas and fully machined combustion faces help optimize airflow.
Race Master straight stem design is suitable for many racing applications.

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About this part

Product Details

If you're working on the top end of your 1999-2004 Ford Mustang with a 4.6L or 5.4L SOHC engine, these Manley Race Master intake valves are a solid option. They're built for engines that see a lot of action, especially if you're racing or pushing your engine hard, up to around 8000 RPM.

These valves are made from stainless steel, which is a good choice for durability. The stems are chrome-plated and the tips are hardened, adding to their wear resistance over time. Manley also swirl-polished the area under the head and fully machined the combustion face. This design helps improve airflow into the cylinder and can contribute to better combustion efficiency. You're getting a set of 8, which is what you'll need for a V8.

Manley offers these in a Race Master straight stem design, which is what you're looking at here. They also have a Race Flo shape if your specific build calls for it. These are also recommended for use in alcohol-fueled engines, particularly for the exhaust side, though the intake side benefits from the same robust construction.