Recently I was helping a friend work on his set-up (non-Mopar) with a terrible drone. He tried different mufflers without much help. We added an H-Pipe (more to help with the low end torque than the drone) and it did affect the drone slightly. We tried something a bit off the wall. He had two different length Flowmaster 50's, for grins and giggles we threw those on, looks a bit weird but the drone is all but gone!
I had a 2001 Mustang GT. They came from the factory with an h-pipe, and the two mufflers were different lengths. I recall questioning this and I was told that Ford did it to reduce drone complaints from customers. I guess it works on Mopars too!
