A catalytic converter is a device used in emissions control systems. It reduces harmful exhaust emissions by converting toxic pollutants (byproducts of fuel combustion) into less toxic gases.
There are a few main types of catalytic converters but a three way catalytic converter (sometimes called a 3 way muffler) is the most efficient and most commonly used today. A 3 way catalytic converter oxidizes carbon monoxide and hydrocarbons, and reduces nitrogen oxides.
Catalytic converters can be used in internal combustion engines fueled by gas or diesel. They are most commonly associated with the engines of cars and other vehicles, but they can be used with a wide range of other engine types. For example, generators, water pumps, and lawn mowers can all use catalytic converters.