Hello folks! I have found a good deal on a Turbo Xs Type-H blowoff valve. According to the Turbo XS website, the Type-H is good to hold from 10-25psi of boost. I have a 93 9000CSE 2.3 turbo, and I don't think it boosts 10psi stock (what is the stock boost pressure, anyways? I could never find this information for some reason!). I also found a very good deal on a Turbo XS Manual Boost Controller. I have read that a MBC will make the APC system obsolete. If I raised the boost level to say, 10 or 11psi, would my engine be alright? I am sorry for these trivial questions, I am just unclear on some things when it comes to Saab engines! I got my '93 9000 on Sunday and I am trying to learn as much about them as possible. Thank you very much in advance!