This is a quick how-to video on how you install a 2 5/8 Attometer boost gauge into one of your factory vents in a MK1 Audi TT. The install was fairly easy, just a little time consuming. With the 2 5/8 gauge, you do NOT need to spend any money on any special adapters, it fits right in, with no gaps, and looks great! Looks like it would have come from the factory. Hopefully this video helps someone out! Like and subscribe!