Not all 1.8t's have an SAI. AEB engine code from passat and some of the audi configurations don't have them. I deleted all that garbage out of the engine bay, and i have a much better vac.

If you're planning on doing it, a friend and I made this DIY while doing it on our cars. It's a lot more fool proof than sav's diy that was posted above with better pictures. You can thank me later.
DIY: Ultimate SAI/N249/PCV/EVAP Delete