i know bbk makes a h or x pipe ( cant remember which ) for long tubes but i am unsure if its just made to work with their long tubes. either way im sure any exhaust shop can modify that easily.
its grounding out. like drop top said, check that cig lighter. in one of my other cars there was a very small spring lodged in the cig lighter that kept it from working and popping fuses.
when i finally go turbo i am going to use on3 as well. its a good entry level kit and even if i have to modify any of the piping its no big deal. i never really believed anything being truthfully bolt on anyway.