
As all of the fuel is burned to create the combustion required to spur a vehicle forwards, various noxious gases are generated as a by-product. Many of these have been detrimental, incorporating nitrogen oxide, carbon monoxide, sulfur dioxide, lead, phosphorous and nitrogen monoxide. Besides transferring harmful carbon monoxide and hydrocarbons into carbon dioxide and water vapor, the exhaust system has been instrumental in determining that the high temperature produced in the course of combustion are recirculated back into the chamber. Moreover, exhaust systems has a sensor which detects the amount of oxygen in the exhaust gas makeup, which aids to keep in check the amount of fuel needed by the engine; leading to an exceptional level of fuel efficiency.