Manley Chevrolet Small Block Exhaust Valve Kit - 1.560in Head Dia. 4.911in O/A Length, 0.3415in Stem

Manley Performance is well-known for making strong internal engine components, especially for racing applications. This exhaust valve kit is a prime example, designed for Chevrolet Small Block engines that see serious use, often operating up to 8000 RPM. If you're rebuilding the top end of a performance engine, these valves are built to handle the heat and stress of combustion.

These exhaust valves are made from high-quality stainless steel, specifically the XH-426 alloy, which gives them solid durability. They also feature chrome stems and hard tips to resist wear over time. The under-head areas are swirl polished and the combustion faces are fully machined. This design helps improve airflow into the cylinder and can contribute to more efficient combustion. They are also a recommended choice for alcohol-fueled engines, which can run hotter and require more robust components.

This kit includes exhaust valves with a 1.560-inch head diameter, a 4.911-inch overall length, and a 0.3415-inch stem diameter. If you're working on a bracket car, drag racer, or oval track engine, these valves are a well-built option to consider for your build.