hey guys I have a b9 s4 with a resonated milteck catback exhaust, I noticed maybe a month after I got the exhaust installed it started making a squeaking sound when I put the car ib dynamic sports mode, its definitely coming from the valves or somewhere in the exhaust, I told a lot of s4 buddies and one said " your muffler is dented maybe that's why ?" idk I that is correct, or if this is an easy fix? or if anyone has had the same issue? help!! thank you
