stage 1 chip only removes (or sets a different level) of boost limit..

All depends on what ECU you're running
0FAB is running 8 PSI 0FAC is running just 7 or 7.5psi as the standard boost limit.

With a stage 1 (165) chip, the only thing done is to raise this boost limit to around 14 or 15 psi. and as the name states, you can reach around 165 BHP with it.

i have a 0FAC with 175 Ahmed Bayoo chip, doing a max of 15psi (before it cuts in) and does 198BHP (of course with some more adjustments like intercooler, cam, fuelpump, fuelpressure, T3)