I have TTI W2 headers and 3" through the dynomax super turbo mufflers and 2 1/2" tail pipes I have a drone at 25-35 MPH. I am think that the 1 7/8" header may be part of the problem. I am installing 2 1/2" Summit 12" glass packs in the tail pipes. I guess I am too old for that much noise. It is quiet above 35 MPH, but I can't stand the noise around town. I hope I don't lose the bark when I stand on it.