The gases and / or particulates from the engine, pass through the collector and are directed to different components of the system.
The catalyst is an anti-pollution key device, one of the components with more technical evolution of the system, and simultaneously the most important. Its main function is to reduce the greenhouse gases produced by combustion, hydrocarbons (HC), nitrogen oxides (NOx) and also the carbon monoxide (CO), transforming them through chemical reactions into harmless substances to the atmosphere and to humans, such as water vapor (H2O), carbon dioxide (CO2) and nitrogen (N2).