Here, on my 07’ E63, you can see the exhaust brackets that mount from the Rear Tranny mount bracket around the sides to each exhaust pipe. ARH’s look like they actually have them built-in on their E63/CLK LTH offering. The only thing I’m very concerned about is the sound of those bad boys being too loud? Has anyone tried them while retaining both (4) Cats, resonator and mufflers? Most everyone that has posted a video with them seems to have deleted one or more?