Corsa exhaust systems claims there mufflers have zero drone. I currently have The force II mufflers from Flowmaster and prior to my BBK headers and off road x pipe, I too had no drone. That's certainly not the case now with drone. Anyone using the Corsa exhaust system on there pony and how is your drone with headers and off road x pipe? I'm gonna have glass pack resonators installed is Tuesday and was wondering if the Corsa exhaust was worth dropping the 600 for it. I really love the tone of my flowmasters now especially with the tips off but not the drone from the off road x pipe.