Manley Chevrolet Small Block Exhaust Valve Kit - 1.600in Head Dia. 5.015in O/A Length, 0.3415in Stem

These Manley Extreme Duty Series exhaust valves start with a 1.600-inch head diameter and a 5.015-inch overall length, featuring a 0.3415-inch stem. They are constructed from Manley's XH-432 XtremeAlloy, a material specifically chosen for its exceptional resistance to extreme heat and force. This makes them a solid choice for high-stress applications like Top Fuel and Funny Car drag racing, as well as demanding marine engine builds and restricted carburetor circle track racing where engine components are pushed to their limits.

Beyond the advanced material, these valves are built for longevity and improved performance. They come with chrome stems and hard tips, which significantly increase wear resistance and help them stand up to the rigors of intense operation. The under-head areas are swirl polished to help smooth airflow, and the combustion faces are fully machined. This attention to detail in airflow optimization can contribute to better combustion efficiency and overall engine performance, especially in highly tuned engines.

If you're building a high-performance Small Block Chevy engine that needs components capable of handling extreme conditions, this kit is designed with those needs in mind. It's important to ensure these valves are properly installed and matched with compatible components for optimal results in your specific build.