Although it's a way to increase boost, it's a dangerous route to follow IMO. There are also some clear errors in the information.
The comment about the boost gauge is one. Another is the contradiction between the following two statements:
- Retains TRIONIC T5 engine protection and adaptation features.
- Raises both boost and over boost fuel cutoff up to 4 PSI.[/b]
By raising the overboost fuel cutoff level, it therefore significantly reduces the protection offered.
It's not a route I would recommend myself for reasons I've expanded on many times before. If you want a safe, reliable increase in performance IMO the correct way to do so is via software control, not by any sort of gadget or add on that provides misleading information to Trionic.