[G35turbo]

Ok stock 91 to 93 is 9psi,and from 94 to 99 is 12psi. That is stock psi. You should not go over 12psi before u got Intake, Down-pipe. And defentily a Boost gauge because the stock one sucks. then you can go on 14psi. But you should not go over 14psi with out any bigger injectors, fuel pump, and a Air/fuel controller. If you go to 3si.org and click on Mods on the left and then click on STAGED PERFORMANCE UPGRADES.
If you want to get some sound you can go get the Turbo XS BOV that is the loudest you can get.
I heard that u should not go over 15psi with stock turbos.