About 8 months ago I installed a set of Pypes "Pype Bombs" axle back exhaust. To me they sound great for local driving. We just returned from a 2k mile driving vacation and still have headaches from the drone! I recently learned about the sound tube and removed it hoping that it was the problem. Although I like it better without the tube, I don't think that it contributed to the drone. I hate to trash a fairly new set of exhaust and was curious if anyone knows of any modification tricks I can do to them to help with the drone? I would appreciate any input. Thanks