The Straight-through Muffler design is a single, perforated type surrounded with two layers of fiberglass to dampen sound. As the name implies, the exhaust gas travels in one end straight through and out the other. An inspection will reveal any damage or rust deterioration that could cause leaks in the muffler or connections. A resonator is another type of muffler. Most of the noise from an exhaust system is sound vibration.
Resonators provide additional sound protection by absorbing excessive sound vibration.
This is the tube that carries the exhaust gases from the muffler or resonator to the rear of the automobile. Tail pipes come in many shapes and sizes. Many of these are flexible, to allow for movement of the system during driving. All should be inspected regularly for damage. Without a muffler, your car would rumble and rattle, shake and vibrate, as you drove down the street.