A catalytic converter is an important component of the exhaust system in a Buick Excelle 1.6 or 1.8 car. The catalytic converter helps to reduce harmful emissions from the engine by converting them into less harmful gases before they are released into the atmosphere.
The catalytic converter is typically made up of a ceramic or metallic substrate that is coated with a thin layer of catalyst material, such as platinum, palladium, or rhodium. When the exhaust gases pass through the catalytic converter, the catalyst material helps to facilitate a chemical reaction that converts harmful pollutants such as carbon monoxide, nitrogen oxides, and hydrocarbons into less harmful substances such as carbon dioxide, nitrogen, and water vapor.