MUFFLER

The exhaust gases from an engine, even through an exhaust pipe, can be tremendously loud and, therefore, they have to be muffled to meet sound emission regulation so as not to disturb public goings-on. The muffler helps do just that. The actual exhaust end-can is not just one long cylinder; it consists of several chambers, each having its own share of sound-deadening material through which the exhaust air stream passes after going through the catalytic converter.