I have had my Scion over a year now it is lowered with rims but have not done any other mods to it. Don't know much about the Scion or really have time to do the research. I have always owned Ford Focus' and modified them.

I had a question since the engine is so small on the Scion would you still get the "sneezing" noise from the Turbo?

 

The blow off valve? Yes if your building boost you will as long as its an atmospheric bov (most of the time)