Question about the status of an Oxycat. Here, on an A6 C4 AEL.

Hello everyone,

If I have any doubts, I can usually resolve them by searching or using other methods.
Unfortunately, I can't find a specific post... honestly!

I have the "problem" that the max. The charging pressure only reaches around 2500 RPM.
If I disconnect the air hose from the "suction" pipe and let the engine run at idle, I feel absolutely no airflow. So, I'll take a look at the Turbo.

Now I've thought about it... 347,000 KM on the odometer... Take a look at the catalytic converter too... So, I've got the part and now I'm standing here with my talent. I can shine through with a flashlight, but not very intensely. It's clearly visible, but doesn't blind at all. On the edge, the dryer blocks the flow of exhaust gases into the catalytic converter. Approximately 5% are lost there. In addition, some channels are blocked here and there by various things (unidentifiable). That is, however, only a minor issue.

Now finally, my question...
How should an Oxycat look from the inside so that you could say... it's at least visually okay?
Can this be answered like this?

Thank you for your effort and attempt....

Best regards
Wool

[Translating...]

Klingt normal.