Manley Volkswagen 1.2L Type I Exhaust Valve Kit 37.50mm Head Dia. 4.405in O/A Length, 0.3130in Stem

These Manley Race Series exhaust valves are made from XH-426 stainless steel, a strong material chosen for its ability to handle the heat and stress inside an engine, especially for racing applications under 8000 RPM. The 37.50mm head diameter and 4.405-inch overall length are specific dimensions for certain Volkswagen Type 1 engines, ensuring a proper fit for rebuilding or upgrading your top end.

Beyond the robust stainless steel, these valves feature chrome stems and hard tips, which add extra wear resistance where the valve meets the valve guide and rocker arm. The under-head area is swirl polished to help smooth airflow into the cylinder, and the combustion face is fully machined. This attention to detail helps optimize how air and fuel mix and burn. If you're running an alcohol-based fuel, these are specifically recommended for exhaust valve use, offering reliable performance in those demanding conditions.