That"s something ,i was taking my srt6 in tommorow, to have the muffler removed and was condersidering having as many as 6 pipes installed. I will see when they get it on the rack. I also have a device that inserts into the pipes that can be packed with steel wool or muffler material and it allows me to tune the sound of the exhaust. It is removeable to allow for easy adjustment. I only have one now ,but will get more as needed. I have done a sound decible test in the car and outside with stock exhaust. Will compare after mod.