A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic emissions. Converters are usually used with internal combustion engines fueled by either gasoline or diesel—including lean-burn engines, KEROsene heaters and stoves.
The first widespread use was in the US automobile market. Models manufactured after 1975 are required to be equipped with catalytic converters to comply with the EPA. Catalytic converters are reliable and effective in reducing noxious tailpipe emissions.
Although catalytic converters are most commonly applied to exhaust systems in automobiles, they are also used on: