Boost pressure is like 14.5psi, I think, but the stock BOV leaks out anything past 12psi. You'll hit 15psi on your boost gauge, then it'll drop to 12 and stay there cuz your stock BOV is a stealing rat bastard of our precious boost pressure.
Your stock turbo might handle up to 22psi (thats killing it) But you'll never get over 12 unless you get an after-market BOV. Intercooler piping and a Greddy/HKS/Apex'i etc BOV will raise your boost between 14-17psi without a boost controller. I hit 17 with my Apex'i installed, but back to 12 cuz I have to run the stock 2G for emissions/non-rice boi reasons.
