Not to hijack this thread, but I have a related question. I had a complete Time Valve stainless system installed on my 68 280sl. Before buying the system (thanks Mark P) I had also purchased a Borla aftermarket rear muffler that I have never installed. My question is, can I install the rear muffler on the stainless system, and if I do will the exhaust note change to any appreciable degree? Thanks for any thoughts or comments.