I got a spot on one of my doors, about of the size of a quarter. It's missing the flakes in the paint, trucks Platinum White. Guess I should just leave it alone
I have the same setup as the OP and added a Vibrant 1142 before the muffler. It helped but not much. I got a second one I'm going to put in after after the muffler.
Ha, the bolt pattern is off on the top. I would check them if you just got some, stock bolts are 3 1/4" apart on all three. The 2.5s I got are 3", 3 3/8", 3 3/8"