What makes the XH-432 XtremeAlloy material suitable for high-performance engines?

XH-432 XtremeAlloy is specifically chosen for its ability to withstand extreme force and high temperatures. This makes it ideal for demanding applications where standard valve materials might fail under stress.

What is the benefit of swirl polished under head areas and machined combustion faces?

The swirl polishing on the under-head areas helps to smooth airflow into the combustion chamber, reducing turbulence. The fully machined combustion faces ensure a precise surface for optimal combustion efficiency and sealing.

Are these valves sold individually or as a set?

This product is listed as a kit, implying it contains multiple valves. Please refer to the product details or contact customer support for the exact quantity included in the kit.

Manley Ford 4.6L V8 Exhaust Valve Kit 11633B-8

Name: Manley Ford 4.6L Modular V8 Exhaust Valve Kit - 38.50mm Head Dia. 4.585in O/A Length, 0.2345in Stem
Brand: Manley Performance
SKU: manley-performance-manley-ford-4-6l-modular-v8-exhaust-valve-kit-38-50mm-head-di-t14-879319
Price: 596.61 USD
Availability: BackOrder

Manley Ford 4.6L Modular V8 Exhaust Valve Kit - 38.50mm Head Dia. 4.585in O/A Length, 0.2345in Stem

$596.61

On Backorder

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

Manley Ford 4.6L Modular V8 Exhaust Valve Kit - 38.50mm Head Dia. 4.585in O/A Length, 0.2345in Stem. Built for extreme heat and force.

Key Features

Fits Ford 4.6L Modular V8 engines.
Features XH-432 XtremeAlloy for extreme force and heat resistance.
Chrome stems and hard tips offer exceptional longevity and wear resistance.
Swirl polished under head areas improve airflow.
Fully machined combustion faces enhance combustion efficiency.
Exhaust valve head diameter is 38.50mm.

⚠️ 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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Product Details

Manley Performance's Extreme Duty Series exhaust valves are built with XH-432 XtremeAlloy, a material chosen for its exceptional ability to handle extreme force and heat. This makes them a solid choice for high-performance Ford 4.6L Modular V8 engines where durability under stress is critical. These valves are designed to stand up to the kind of punishment seen in demanding racing applications, ensuring reliable performance when you need it most.

You'll notice the attention to detail in their construction. The valves feature chrome stems and hard tips, which are key for resisting wear and ensuring a long service life, even in aggressive engine builds. The under-head areas are swirl polished to help improve airflow, and the fully machined combustion faces contribute to better combustion efficiency. These design choices work together to help your engine breathe easier and perform at its best.

This kit is specifically for the Ford 4.6L Modular V8 and includes exhaust valves with a 38.50mm head diameter and an overall length of 4.585 inches, with a 0.2345-inch stem diameter. If you're rebuilding the top end of your 4.6L Modular V8 and need components that can handle significant heat and stress, these Manley valves are a well-built option to consider.