Gagtomian cylinders

Hello together! I got my GZ the day before yesterday and now I have a problem. According to the instructions, the installation is probably no problem, at least with the TT. Here the GZ has to be placed directly on the pressure tube between this and the N 75. I have never looked under a TT hood,( I saw ́n photo a long time ago) but the pressure tube is directly installed around the engine ? Only I have an A6 – see signature – and it has no such pressure tube. With me hangs the N 75 unt I hope that the GZ is not only used by TT-Driver, I would be interested in the effect. Maybe one has already installed it in `nem A4 o.ä. or there are illustrated links ? Many thanks in advance! Many greetings