What is a muffler?
A muffler is the exhaust system of an engine, designed to reduce emissions and noise. In the case of a vehicle, it is usually located underneath the car at the rear, though freighter trucks often use a vertically mounted system behind the cab. A muffler consists of a backbox and one or more tailpipes. When a vehicle is smogged, the inspector will insert a probe inside the tailpipe to read smog emissions emanating from the engine.
