Hello Opel friends, I finally got to put down a flap in the exhaust system of my E-record, at least I tried it. The clattering sounded very suspicious to KAT; so once the good piece was unscrewed and I still got a whole 2 chunks of coal against it. The rest seems to be stuck in the middle silencer. So MSD has to be new, no question but what does the KAT look like? It is an old village tuner legend that the power/motor run without KAT And one even said to me that it should even be possible with a properly adjusted engine and working Lambda probe to pass the AU without KAT. What about it? I don’t need any advice about possible legal consequences, I know it is tax evasion and not an environmental price suspect ;-). But if it is already empty…. M.F.G The scrap metal fanatic