I'm wanting to up my boost 12-13 PSI. I ordered a cooleeze turbo inlet. I researched and found that I can drill a hole in it and thread a piece on to connect an air filter (breather type) on the turbo inlet to have a little more unmeasured air. Can anyone correct this if it's wrong. It makes sense to me, the question is would it allow possibly 13 PSI? Has anyone else done this to confirm?