Welcome aboard, glad to have you here. :ws
There is a lot of information in the self help area, plus lots of members that have a ton of knowledge, but I believe that a stage one includes some kind of fuel adjustment, with either a download or some type of fuel controller, (I use the Doebeck for my bike, other options are available) a different air cleaner, (bigger to allow more air flow) and pipes.
Since you have the pipes already, you should only need to consider the type of fuel adjustment and the air cleaner.
I noticed quite a difference in my overall running temp, (just by feel) and definitely got better gas mileage.
Others can correct me if I have misguided you, but I think you will like the end results.