My MBRP exhaust has been in my car for a 4-5 months now. I guess the hangers have settled some because a couple weeks ago I started getting a rattle from the exhaust hitting the cross bar near the center of the car. I ended up fixing it pretty easily. I bought 8 stainless washers at lowes. They are the really wide ones with a 1/2" hole. See pics below. I put the washers on the bottom side of the brace and taped them in place for easy installation. I stacked 2 washers on each bolt. I screwed the cross bar back in place and all is good with no annoying rattle. I wonder if the aftermarket cross bars are lower hanging?
This added just enough room so that the exhaust doesn't touch the cross bar.
This added just enough room so that the exhaust doesn't touch the cross bar.