What makes these valves 'Extreme Duty'?

These valves are built using XH-432 XtremeAlloy, a material designed to withstand extreme heat and force. They also feature chrome stems and hard tips for enhanced durability and wear resistance, making them suitable for high-stress applications.

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

These design features are intended to improve airflow into and out of the cylinder. This can lead to more efficient combustion and contribute to better overall engine performance, especially under demanding conditions.

Are these valves suitable for a standard street application?

While designed for extreme racing and marine applications, their robust construction and improved airflow can also benefit a street-driven Coyote 5.0L engine where enhanced durability and performance are desired.

Specifications

Brand: Manley Performance
Part #: 12627B-8
UPC: 807298094076

Manley Ford Coyote 5.0L 32mm Extreme Duty Exhaust Valves (Set of 8)

Name: Manley Ford Coyote 5.0L 32mm Extreme Duty Exhaust Valves (Set of 8)
Brand: Manley Performance
SKU: manley-performance-manley-ford-coyote-5-0l-32mm-extreme-duty-exhaust-valves-set--t14-313453
Price: 596.61 USD
Availability: BackOrder

$596.61

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Manley Ford Coyote 5.0L 32mm Extreme Duty Exhaust Valves (Set of 8). Built for extreme heat and force.

Key Features

Fits Ford Coyote 5.0L engines.
Set includes eight 32mm exhaust valves.
Constructed from XH-432 XtremeAlloy for extreme heat and force resistance.
Features chrome stems and hard tips for exceptional longevity and wear resistance.
Swirl polished under head areas and fully machined combustion faces improve airflow and combustion efficiency.

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About this part

Product Details

If you're rebuilding the top end of a Ford Coyote 5.0L engine and pushing its limits, especially in high-heat or high-stress scenarios, these Manley Extreme Duty exhaust valves are a solid choice. These aren't your average valves; they're built with materials and features typically found in top-tier racing applications like Top Fuel dragsters and marine engines, where durability under extreme conditions is non-negotiable.

The key to their strength is the XH-432 XtremeAlloy material, specifically chosen for its ability to handle intense heat and pressure. You'll also notice the chrome stems and hard tips, which add significant wear resistance, meaning these valves are built to last through many demanding cycles. Manley also focused on airflow with swirl polished under-head areas and fully machined combustion faces. This design helps improve how air moves into and out of the cylinder, contributing to better combustion efficiency and overall engine performance when you really need it.

This set includes eight 32mm exhaust valves, providing what you need for a complete Coyote 5.0L engine rebuild. While designed for extreme applications, their robust construction and improved airflow characteristics can benefit any Coyote engine build where reliability and longevity are top priorities.