A catalytic converter is a device that reduces the toxicity of exhaust gases from an internal combustion engine. It is typically located in the exhaust system, between the engine and the muffler. Catalytic converters work by converting harmful pollutants, such as carbon monoxide, hydrocarbons, and nitrogen oxides, into less harmful substances, such as carbon dioxide, water, and nitrogen.
Catalytic converters are an important part of reducing air pollution from vehicles. They have been required on all new vehicles sold in the United States since 1975. Catalytic converters have also been shown to improve fuel efficiency and engine performance.