I am not familiar with where you are at but i am located smack dab in the center of the state(near Penn State's University park campus) and i know another speed owner about an hour northeast of me. They are pretty few and far between once you get away from the bigger cities like pitt and philly.
If you are going to get a bypass valve(there is a difference, you want bypass with this car, not blowoff) you are getting it mostly for the sound unless you plan to mod further. The stock one holds the pressure fine until you get into some more modding. As far as exhaust, you are on your own. I haven't looked into them enough to give much advise but check out the other forums for more speed specific advice.
