Hi, the day before yesterday my Audi got a whole number louder or pulled even more air than before. I already knew that the KAT flange was supposed to be a small hole. This has now been forgotten. Unfortunately, you can’t weld much or somehow save this flange, because all screws are already badly rusted and actually it’s only a matter of time until things fall apart. Unfortunately, the solution is called directly new KAT + connecting pipe to the exhaust. Where should I then Dana Is there a KAT that would directly bring Euro 2 standard, so you would hit 2 birds with one stone?! Is the JN 1.8S.