You have a metal BPV stock, if for whatever frankenstien reason it were to start leaking, look up the 2 cent mod where you essentially hit it with a hammer, then put it back on. 02-07 BPV's rarely leak or fail. You won't be pushing near enough pressure to cause an issue with it.
If you want a BOV for sound, you're doing it wrong.
If you already have a tuner, call them instead of making the thread and ask them since they will know 100% and not give you 5 different answers.
So lets recap, in order for this to work you need:
-Turbo (VF39 or 48. Honestly doesn't matter which. 39's aren't bad at all, and a bit cheaper)
-STI TMIC or nearly any aftermarket TMIC
What you do not NEED:
-3 Port BCS (can throw one on if you REALLY want it)
-Fuel Pump (Same thing, only if you want it for poop and giggles)
-Injectors (Useless at this stage)
-Magical Unicorn dust (overpriced)