Hello, I’m driving an Audi 100 2.8e that actually has a double-cat system. Now it’s the case, however, that the previous owner has flexed the Kats out, so that he probably has better sound, because I have to do the Tüf, of course, I need catalysts again. Since the rear silencer is also not the true one and the connecting pipe in the middle also leaks I would like to install a completely new system. Now I could get quite cheap a complete exhaust system with cat and silencers from the A6 C4 2.8er, which has only one cat, but is technically identical. Now my question, if I rebuild the complete system from Krummer, that fits then and is for the Tüv ok, because the sonnst 2 Kats has ? mfg Overroller