what is the muffler
A car muffler is a component of the exhaust system of a car. The exhaust system has mainly 3 functions: 1) Getting the hot and noxious gas from the engine away from the vehicle. 2) Reduce exhaust emission. 3) Attenuating the noise output from the engine. The last specified function is the function of the car muffler. It is necessary because the gas coming from the combustion in the pistons of the engine would generate an extremely loud noise if it were sent directly in the ambient surrounding through the exhaust valves.