Hello all, I recently put a cat-back Racing Beat exhaust system on my S5 vert (absolutely love both the car and the exhaust), but I am also going to get an aftermarket aero kit down the road. I already know I will be getting an Odura lip from corksport and a set of sideskirts (also from corksport), but I've heard that aftermarket rear lips and bumpers interfere with the RB exhuast. Anyone have confirmation of this or know of some bumpers that DON'T have this issue? I'm not a fan of the stock rear bumper. Thanks, all.