What material are these Manley exhaust valves made from?

These valves are constructed from Manley's XH-432 XtremeAlloy material. This alloy is chosen for its exceptional strength and resistance to extreme heat and force.

What makes these valves 'Extreme Duty'?

The 'Extreme Duty' designation comes from their construction using XH-432 XtremeAlloy, chrome stems, and hard tips, all designed to withstand the high heat and stress found in demanding racing and marine applications.

Are these valves suitable for a standard street engine rebuild?

While engineered for extreme applications, these valves can be a robust choice for any Ford 4.6L or 5.4L SOHC engine build that demands high reliability and durability under significant stress and heat.

Specifications

Brand: Manley Performance
Part #: 11631B-8
UPC: 807298063133

Manley Ford 4.6L/5.4L Small Block SOHC Extreme Duty Exhaust Valves (Set of 8)

Name: Manley Ford 4.6L/5.4L Small Block SOHC Extreme Duty Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-ford-4-6l-5-4l-small-block-sohc-extreme-duty-exhaust-v-t14-43570
Price: 596.61 USD
Availability: BackOrder

$596.61

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Manley Ford 4.6L/5.4L Small Block SOHC Extreme Duty Exhaust Valves (Set of 8). Built for extreme heat and force.

Key Features

This product includes a set of 8 Manley Extreme Duty exhaust valves.
Constructed from XH-432 XtremeAlloy material for superior heat and force resistance.
Features chrome stems and hard tips for enhanced longevity and wear resistance.
Swirl polished underhead areas and fully machined combustion faces improve airflow and combustion efficiency.
Designed for specialized applications requiring extreme heat and force resistance.

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About this part

Product Details

This set includes eight Manley Extreme Duty exhaust valves, specifically crafted for Ford 4.6L and 5.4L Small Block SOHC engines. These valves are built to handle extreme conditions, making them a solid choice for high-performance applications where heat and stress are significant factors.

The core of these valves is Manley's XH-432 XtremeAlloy material, chosen for its exceptional strength and heat resistance. To further enhance durability and wear resistance, they feature chrome stems and hard tips, which are crucial for longevity in demanding engine builds. The design also includes swirl polished underhead areas and fully machined combustion faces. This optimization helps improve airflow into the combustion chamber and can contribute to more efficient combustion.

While these valves are engineered for extreme applications like Top Fuel, Funny Car, and marine engines, they offer a robust solution for any Ford 4.6L or 5.4L SOHC build that pushes the limits. When rebuilding the top end of your engine, selecting valves that can withstand high temperatures and significant stress is key to reliable performance.