[cheapskate]

How long was the exhaust actually used? I have a Magnaflow system and it droned like hell when I first got it. I was not sure what I was going to do about it so I put up with it until I could figure something out. Then one day the drone just wasnt there. I have heard that it takes time for the sytem to break in. I thought that was total BS but I can say from personal experience that it is true. Maybe just leave it alone if it has not been used for very long and see if the same thing happens for you.