I currently own a Bullitt -08. I like it alot but would like some more power... I'm a total rookie at tuning so I would definately need some good advice where to start...

Intake? Headers? Underdrive pulley? Ignition stuff? Other stuff?

Where should I start and do I need to readjust the chip/electronically tune it after installing stuff as above?

I like to increase power by approx 50-80 HP and I use it on roads...