Manley Chevrolet Small Block Exhaust Valve Kit - 1.600in Head Dia. 5.050in O/A Length, 0.3136in Stem

These Manley Race Series exhaust valves start with a 1.600-inch diameter head and are 5.050 inches long overall, with a 0.3136-inch stem. They're built from high-quality stainless steel, which is a solid choice for handling the heat and stress inside an engine, especially if you're running alcohol fuels. The under-head area is swirl polished to help smooth out airflow into the cylinder, and the combustion face is fully machined to keep things efficient.

Manley adds chrome stems and hard tips to these valves. This helps them stand up to wear and tear over time, giving you more reliable performance, especially in engines that see a lot of use, like those in bracket, drag, or oval track racing that operate under 8000 RPM. You can choose between a straight stem or a Race Flo shape depending on what your specific engine build needs.