What material are these Manley exhaust valves made from?

These valves are made from Manley's XH-432 XtremeAlloy, a material specifically chosen for its ability to withstand extreme heat and force. They also feature chrome stems and hard tips for added durability and wear resistance.

What kind of performance gains can I expect from these valves?

The swirl polished under head areas and fully machined combustion faces are designed to improve airflow into the combustion chamber and enhance combustion efficiency. This can contribute to better overall engine performance in specialized, high-stress applications.

Are these valves suitable for a standard street engine rebuild?

These are Manley Extreme Duty valves, engineered for highly demanding applications like drag racing and marine use where extreme force and heat resistance are critical. For a standard street engine, a different valve series might be more appropriate unless you are building a very high-performance street/strip engine.

Specifications

Brand: Manley Performance
Part #: 11705-8
UPC: 807298056371

Manley Extreme Duty Stainless Steel Exhaust Valves Small Block Chevy V8 1.600 - Set of 8

Name: Manley Extreme Duty Stainless Steel Exhaust Valves Small Block Chevy V8 1.600 - Set of 8
Brand: Manley Performance
SKU: manley-performance-manley-extreme-duty-stainless-steel-exhaust-valves-small-bloc-t14-4385979
Price: 596.61 USD
Availability: BackOrder

$596.61

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Manley Extreme Duty Stainless Steel Exhaust Valves for Small Block Chevy V8. Set of 8, 1.600 diameter. Built for extreme heat and force.

Key Features

This set includes eight Manley Extreme Duty Stainless Steel Exhaust Valves with a 1.600-inch diameter.
The valves are constructed from XH-432 XtremeAlloy, a material designed for extreme heat and force resistance.
Chrome stems and hard tips are featured for exceptional longevity and wear resistance in demanding applications.
Swirl polished under head areas and fully machined combustion faces help improve airflow and combustion efficiency.
These valves are ideal for specialized applications like Top Fuel, Funny Car, and marine engines, as well as restricted carburetor circle track racing.

These valves are designed for Small Block Chevy V8 engines and are intended for specialized high-performance applications. Always confirm compatibility with your specific cylinder heads and valve train components.

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About this part

Product Details

In this set, you get eight Manley Extreme Duty Stainless Steel Exhaust Valves, each with a 1.600-inch diameter, designed for Small Block Chevy V8 engines. These valves are specifically crafted for applications that push the limits, like Top Fuel and Funny Car drag racing, high-performance marine engines, and competitive circle track racing with restricted carburetors. They are built to handle extreme force and heat, making them a solid choice when your engine needs to perform under the most demanding conditions.

The core of these valves is Manley's XH-432 XtremeAlloy material, chosen for its exceptional ability to withstand intense heat and stress. To ensure they last a long time in these high-stress environments, they feature chrome stems and hard tips, which significantly improve wear resistance. You'll also find that the under-head areas are swirl polished, and the combustion faces are fully machined. This attention to detail helps improve airflow into the combustion chamber and contributes to more efficient combustion, ultimately boosting your engine's performance.

Because these valves are intended for specialized, high-performance builds, it's important to ensure they are compatible with your specific cylinder heads and valve train components. Proper installation according to Manley's guidelines is crucial for achieving the performance and durability these valves are known for.