I think that Stage refers to specific mods already done to the car, such as, a Cobb intercooler, or exhaust etc. If your car is stock, I believe that there is only one basic tune that you can use. I think it is Stage 0? Search around the site. You'll find a lot of threads about the Accessport...
Mod update:
Steeda Subframe Braces: Very happy with the purchase. Definitely tightens up the rear. I wasn't worried so much about wheel hop but, rather the rear end breaking loose. Especially when it is raining and making a hard right turn, like pulling out of a gas station on to a major road...
Quick update...Just installed the Steeda Subframe Support Braces, US Lower Grill, LED DRL's, and while I was at it, dipped my front spoiler "Flame Red." Did a test drive and the braces help a lot. Gave some gas into hard turns to see if the rear would break loose....but, didn't happen. Also got...
Easy job right? Only 2 bolts. Right? Well they just wouldn't line up. Either I would get the top one in and the bottom wouldn't or I would get the bottom one in and the top not. Despite jacking in various places, body, under the knuckle, rubber mallet, pry bar etc.----Just a total NOGO! And mine...
Just a little update on the Steeda 2 Point Brace. A couple weeks of driving after the install, I can say it definitely tightens up the front end (along with the Strut tower brace). Everything is tied together and the driving aspect in corning, the difference is very noticeable. Glad I did it...