Your exhaust system is more than a muffler. It is a series of pipes that run under your vehicle, connected to your muffler and catalytic converter. The main function of your exhaust system is to control noise and to funnel exhaust fumes away from passengers. A vehicle”s exhaust system routes waste gases from the engine to the rear of the vehicle, where they are discharged into the atmosphere. Exhaust gases contain dangerous substances such as carbon monoxide, which can be hazardous if allowed to flow into the passenger housing of the vehicle. The exhaust system also converts pollutants into less harmful byproducts, reduces the noise of the engine, and directs exhaust gases so they can be used to heat air and fuel before they go into the engine’s cylinders to be burned.