I have a 2012 V6 3.7 Mustang Premium w/ automatic tranny and so far I've added Roush Axle-Back Exhaust, C&L CAI, and I'm running a Bama 87S Tune. The Roush's sound great most of the time but when cruising on the highway around 70mph there is a very loud drone in the cabin, if this could somehow be reduced a little bit I think I would enjoy it more. The drone usually happens around 1500-2000 rpm's. I've only had the Roush's on for a couple days and I think they have calmed down a bit but the drone is still pretty loud. Any ideas of possibly reducing the drone? different tune? resonators?