Electronic muffler, dual muffler system, silent muffler. If you close it, the "Al-Saqr" or "Abu Tair" sounds like the original, and the loud muffler is the "Crash" muffler, its sound is very loud. It fits Land Cruiser models from 98 to 2007 for 6 cylinders only. It fits the original Jeep without welding or any cutting. The accessories with the muffler are the device, the air hose, and two remotes.