ever since ive been putting stuff on my truck like intake, programmer and exhaust ive been hearing a exhaust leak kinda sound from my truck, the exhaust has no leaks and is all tightly clamped so i dont see it being that.. and i got up and under the truck with the truck running and cant feel any exhaust leaks.. or hear them. Its only when you drive down the road and let it rev to 2900 rpm, it sounds like complete **** and is really loud, but it only happens at 2900 rpm no where else in the rpm range, so i have no clue what it is??????