What is the purpose of an exhaust emission system?

The purpose of an exhaust emission system is primarily to reduce air pollution. This system is designed to control and minimize the harmful gases and pollutants that are released into the atmosphere as a byproduct of the combustion process in an engine. By using components such as catalytic converters and exhaust gas recirculation systems, the exhaust emission system helps to convert harmful pollutants into less harmful substances before they exit the vehicle's exhaust.

While it is true that other components of a vehicle can contribute to increased engine power, improved fuel efficiency, and enhanced overall performance, these are not the primary functions of the exhaust emission system. The focus is on ensuring that vehicles meet environmental regulations and reduce their impact on air quality by lowering the levels of emissions that contribute to pollution.