Specifications
- Brand
- Manley Performance
- Part #
- 11679-8
- UPC
- 807298062808

Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
$349.40
Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8). Built for high-temperature gasoline engines with exceptional fatigue life.
Key Features
- Set of 8 exhaust valves for Chevy LS-7 small block engines.
- Constructed from XH-428 material, offering high tensile strength at elevated temperatures.
- Tested to withstand up to 100 million cycles under significant stress and heat.
- Designed for high-temperature gasoline engine applications.
- Features chrome stems and hard tips for enhanced durability.
- Swirl-polished under-head areas and machined combustion faces improve airflow and combustion efficiency.
Product Details
Manley Performance is well-known for making strong engine components, especially for racing applications. These Severe Duty exhaust valves are a prime example, designed specifically for Chevy LS-7 small block engines. If you're rebuilding a high-performance engine that runs hot, these valves are built to handle the stress.
Manley uses XH-428 material for these exhaust valves, which they say has nearly double the tensile strength at 1500°F compared to other common materials like EV-8. They've also put these valves through serious fatigue testing, enduring up to 100 million cycles at 40,000 psi and 1400°F, which is a notable improvement over many competitor valves that failed much sooner. The valves also feature chrome stems and hard tips for added durability, and the under-head areas are swirl-polished to help improve airflow into the cylinder.
This set includes eight exhaust valves, enough for a complete engine. They are designed for gasoline engines that operate at high temperatures, making them a solid choice for demanding builds.
Specifications
- Brand
- Manley Performance
- Manufacturer Part #
- 11679-8
- UPC
- 807298062808
Frequently Asked Questions
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Manley Chevy LS-7 Small Block Severe Duty/Pro Flo Exhaust Valves (Set of 8)
