Hello Guy’s, with my MV6 the exhaust system is clapping. Now I was just at Opel to see what is defective or loose. Visually the system looked quite good. The mechanic then knocked off the system once and in both middle pots it claps as if there is something in it. According to Opel it may be that both catalysts have dissolved and parts are lying in the middle pot. To determine this exactly, the system has to decompose. Can it be that both Kats “recommended” and parts of the catalyst get into the medium pot or can also have dissolved in the medium pots? Outer damage like putting on or similar can not be recognized. If it is really the cats, then that was for my MV6. Greeting Herbert