Well with all the raves about Tubi I took the plunge about a year ago on my 355. I never liked the stock exhaust for sure, very quiet at idle and not enough zest up top. The Tubi fixes these issues at a cost. That cost is cabin resonance. Am I alone in having this opinion of a Tubi on a 355?? its worst at 2/3 K. If your just out for a quick blast its bearable for to use the car for distance its not something im keen to continue with. Question is what does one do?? capristo?? anyone fitted this and can tell me direct comparison?? fuchs?? Would be great to have some real comments rather than I love my tubi ones please!!