thanks for the simple illistration! man what a help!!! Forget about the hot side of the turbo.... that part is irrellevant. when piping a compound turbo system (like i said before, but you somehow missed) you run the "high" pressure side ( out or 2 in your diagram) into the "low" pressure side of the second turbo (in or 1 in your diagram). At what point do you modify the piping to the hot side of the turbo (6 and 7)?? Oh, thats right, you dont. You know so much about turbos, but have never seen an intercooler with dual inlets?? lol. Why are you arguing over this? Grow up and stop hijacking threads. I would like to apologize for this kid to the thread starter...