Yeah, found out why I was only hitting 5 PSI in the S4 last night around midnight. I got bored so I tore off my throttle body boot. It looked like this

SO lucky for me I have a parts car, so I drove 35 miles one way to get it because all the european parts stores are closed on Sundays, and Advance/Auto Zone stocks literally nothing but the fog lights for the S4...
After being at the parts for for 5 minutes, driving back for about 40 minutes and a 5 minute install I (hopefully) have no more boost leaks.