Borla has some clips on their Cat-back system on their web site. (or used to have them??) I have had the Borla Cat-back's installed for 3500+ miles now (since Mar). I still love their sound. Not too loud, no real droning at cruise, at WOT really show their presence, etc.... They seem to give just enough extra presence to the car without being like a boy racer, but if that is what you want, then they would not be right for you. Since I am 48, I still like noise, but not as much when I was younger! lol I still don't know what I want to do when I grow up! lol