Automotive Hydrogen HHO generatorsGS is an engineering company dedicated to the research and development of Automotive Fuel Saving Technologies.We manufacture the industry?s most efficient and affordable Hydrogen HHO generators for cars, trucks, buses and boats.GS is the only company to design and manufacture the complete range of electronic controllers: EFIE, Diesel Tuner, ProTuner, PWM. These devices are used to further increase the efficiency of the engine and maintain a constant, reliable supply of HHO.Our products are compatible with every existing HHO system, work for all types of fuel: gasoline, diesel or LPG and are transferable from one vehicle to another.