How to Make Your Muffler Last
Mufflers are a required component on any vehicle that operates on roads in the United States. Mufflers serve two functions:
(1) To reduce exhaust system noise that is directed from exhaust ports to the exhaust pipes
(2) To help direct exhaust gases out of the engine
Most people think that mufflers are also an important part of vehicle emissions but the emissions are actually controlled by the catalytic converters; which are installed prior to the rear muffler and are designed to reduce dangerous chemicals produced by the engine. Mufflers, on the other hand, simply control the sound these gases make as the exit the vehicle. When mufflers become worn out or rusted, they typically lose their ability to effectively "muffle" the sound of the vehicle's exhaust, making your car run very loudly.
Mufflers typically last five to seven years on most US vehicles but can become worn out prematurely if not taken care of. If you want your muffler to last as long as possible, here are a few things to avoid: