What is a muffler? Your car's muffler is attached to the engine inside of your vehicle. The sounds that your engine makes will be quieted down by your muffler. From there, your muffler will expel these sounds from the exhaust in your car. Some vehicles have two exhausts, typically if it is a powerful, much louder vehicle. People don't realize how loud an engine actually is, but if your muffler isn't working right, you will definitely notice it.

