Some questions about my 1.9L

I´m sick of hearing people shut me down about my ´Scort. Everyone that has actually been in it has said something to the effect of, "Wow, this thing actually has some kick!" I want to take advantage of the possible power of my car, with out having to do an engine swap. I know that nopi.com sells parts made by Pace Setter for the 1.9 L engine. I saw cat back exhaust, intake, headers. They all look like a good addition, but I need some experienced oppinion. If any one could give me some sound advice on how to turn the ´Scort into a civic killer, it´d be much appreciated. Also, if you have any idea of potential HP gain, include that too. Thank you all again!

P.S. It´s a 1995 4 door LX Hatchback