Not sure if K/N has got their CAI out yet.
Pulling the hydrocarbon trap will net you about 5 rwhp. The Magnaflow (which I had installed on mine) will net you between 5-10 rwhp. I've seen dyno results on the Magnflows only in a car and they weren't that impressive. 5 rwhp in most cases. But even with just those two, if you look at a bone stock GT (average of 266 rwhp) + 5 + 5 = 276 rwhp + 17% = 322 bhp. Not bad for the price. I doubt you'll get more than a handful of HP from these mods (CAI, exhaust, removal of trap). I am not expecting much from the CAI. Probably about 5 rwhp as well. Tuning it will pick up a lot. SCT has their's out already but I am too nervous about flashing this car when it's so new and may need warrenty work. A supercharger would be the biggest gain for you in HP. Still, 322 bhp is a fast car. I would expect low 13's with it (manual) and a good driver on bigger rubber.