A catalytic converter is a device that reduces the pollutants in exhaust gases from an internal combustion engine. It is typically located in the exhaust system, between the engine and the muffler. The catalytic converter contains a catalyst, which is a material that speeds up a chemical reaction without being consumed. The catalyst in a catalytic converter helps to convert harmful pollutants, such as carbon monoxide, nitrogen oxides, and hydrocarbons, into less harmful substances, such as carbon dioxide, nitrogen, and water.
Catalytic converters are an important part of the emissions control system in modern vehicles. They help to reduce air pollution and protect the environment. Catalytic converters have been required on all new vehicles sold in the United States since 1975.