First things first. . .ditch the short ram. I imagine you are lookin at DC sports for everything. Don't. They can be a bit overpriced for what you get and I know for a fact that you can get the AEM full cold air system for less then 200 shipped at importparts.com. If you use a short ram, you are just going to pull hot air from your engine bay and you basically eliminate the benefit of the intake by doing that. I agree whole heartedly with the header and exhaust choice (my DC header is on the way). I'm currently using 5zigen for exhaust and I like it a lot, so you might look at them or Apexi for the amount of money you are going to spend.

Your connections as far as exhaust and header go should be three bolt except for maybe where the connections are to the cat. The aftermarket parts you buy may be three bolt for their own sections but they'll have the proper connections on the pipes that connect to the cat so don't worry about that. I assume the cat is the only part you are keeping. The exhaust is suspended from hangers under your car so the only bolts you have to worry about will come with it.

I sincerely doubt that you will need a fuel regulator with these mods. Your factory ECU is more than capable of compensating for the increase in airflow through your system so long as you reset it after your mods are installed.

Ignition is always a good mod. It will make your throttle response and acceleration smoother so talk to the other members about what components to get as I'm a little light on info there personally.

Good luck with your mods, Don't forget pics.