A car’s muffler soundproofs the pressure created by the engine. While you may not think a car’s exhaust system has anything in common with a finely-tuned musical instrument, the muffler is exactly that. It uses complex physics to cancel out the sound waves that make your car noisy.
Beyond the sound
Since the muffler is part of the exhaust system, it not only keeps your car running quietly, it also directs exhaust gases away from your car and helps it run smoothly. According to eHow, there are three main ways you can figure out if your muffler (or exhaust system) have problems:
Mufflers may reduce engine power because the gas flow from the engine is obstructed to a degree. Therefore, some drivers trade in their manufacturer’s muffler for an after-market one designed to increase power.
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