The muffler on the 1998 Dodge 3500 Diesel is the main component that prevents the diesel engine running too loud. The exhaust pipe that is attached to the exhaust manifold on the front of the engine travels under the truck and into the muffler. As the sound of the engine travels through the muffler, the baffles inside of the muffler cause the sound to exit in a quieter manner. Over time, the