HB500X series is one of our latest fuel saver save your fuel by generating hydrogen gas. The hydrogen gas will replace part of your fuel to save your petrol bill. It designed for all type of engines. Our units do not store the hydrogen like others homemade units, It is works on a supply on demand basis. The hydrogen fuel is added to the air intake of your engine where it is then burned with the gasoline. The wonderful thing about our HB500X series is that it replaces part of the polluting fuel with clean-burning hydrogen and so, it greatly reduces the amount of harmful emissions. It also makes the gasoline burn with less hydrocarbons and Nox emissions.