So, my original oem muffler died on me. so I decided to install a doble pipe using both pipes that was is the salvage muffler and my original one. so i when fron 2.5" of diameter to 4.7" of total diameter of exhaust pipe. it has the cat converter and only one silencer that has 2 pipes in and 2 pipes out please check pics @sally.overland in instagram http://cloud.tapatalk.com/s/604b51d8a3e72/VID_23621122_042915_785.mp4