Pro-Line Drosselklappen-Reiniger, a cleaner for throttle flaps. Properties. A special active dissolving product for cleaning typical dirt, soot and deposits in the inlet area and from the throttle flaps. It dissolves and removes all oily deposits and dirt such as oil, resins, glue, etc. It reliably cleans injectors and internal parts. It ensures functionality and mobility of parts, reduces fuel consumption. Application. Spray the product on non-operating dirty parts and leave for 2 - 3 minutes. Then start the engine and Heavily spray the product on the whole area at medium revolutions. Repeat the cleaning procedure in case of extreme contamination. Only for gasoline engines.