IMO there are a couple places to gain, a divorced down pipe will help pick up power, however you might need to port the wastegate in order to get it to lower the boost enough with a free flowing muffler when adding the divorced wg. The extra fuel injector system that hurricane is working with looks neat, its a stand alone box with extra fuel injectors or injector not sure, that fire only on boost. I would inquire more into this system. When I built my turbo rzrs the stock injectors run outta fuel so they have a neat little manifold that goes in and a dobeck box that you can tune. Works awesome.
IMO if you want to run more boost on a stage 1 you need to get the heat out, and the fuel system addressed.
Hurricane secondary injector kit
I did check into this Hurricane kit and I haven't ruled it out but I was curious about what other options are out there that people have come across and had success with with there own test and tune. I'm sure that the kit is an awesome addition but by the time I add a fpr and have it shipped to the states I will be knocking on 2 g's.... And I still need to add a clutch, which to those who have offered up options there I will keep you in mind but my clutch choice will probably be my last decision that I make in regards to what I decide to do here over the summer.