Ok I have 2 Challengers. The car Im looking for exhaust suggestions on is my 2016 Scat pack Shaker. I also have a 2011 R/T 5.7. On the R/T I put strait pipes to where the resonators are and that's where I put Flowmaster Super 10s. It sounds awesome but its a 6 speed and still has mild drone. I have heard that the Automatic in the scat pack would drone twice as much. I looked up exhaust systems but because of the active exhaust the prices are outrageous, nearly $1500 before install. I've also heard the leaving the stock resonators and just replacing stock mufflers with flowmasters would make almost no difference in sound. I want a deep rumbling sound without the drone....Suggestions???