Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.065in O/A Length, 0.3415in Stem

These Manley Race Series exhaust valves are built from XH-426 stainless steel, a strong material chosen for its ability to handle the heat and stress of high-performance engines running up to 8000 RPM. They are specifically designed for Chevrolet Small Block applications, featuring a 1.625-inch head diameter and a 5.065-inch overall length with a 0.3415-inch stem diameter.

The valves are swirl polished under the head and fully machined on the combustion face. This machining helps improve airflow into the cylinder and can contribute to better combustion efficiency. For added durability, they come with chrome stems and hard tips, which resist wear over time. These are also a recommended choice for exhaust valves in alcohol-fueled engines, where they offer reliable performance.

You can select between Race Master (straight stem) and Race Flo shapes to best match your engine's specific airflow needs. If you're rebuilding the top end of a performance Chevrolet Small Block, these valves are a well-built option for demanding use.