Bjorn, My '68 has only the transverse muffler on it and I have no problems at all. It is, for the most part quiet at idle, but is as noisey as I care for on a driven car. I got the entire system from a POCI advertiser, I want to say Kapich or something like that. Fit & function was my primary concern rather than performance. Prior to this system, with headers I had only the two and no transverse. It never gave me problems, but I wanted a more original appearance since I'd put a set of long branch manifolds on it back in '88.
