Not a lot of room in the Audi TT especially if it's a vert.
Started with Accuair's Switch Speed management, 3 gallon aluminum tank and a single Viair 444c compressor. It was neatly fitted in the small trunk area only exposing the tank and compressor. The interior proved to be tight in space while trying to locate gauges to mount and keeping the flow of the clean lines of the TT. A custom gauge mount was made and added to the lower ashtray allowing function to both gauges and ashtray.