headers

i got a 90 celica gt and i finally after i dunno how long found some sweet looking headers :) well im just asking if for $550 it would really be worth it? how much hp am i looking at? any other suggestions to make my car faster?
http://www.hotshot.com/products_headers.htm
^bottom of that page has the headers if u wanna take a look

headers alone? 7 hp? Headers alone don't free up a whole lot of hp they help with response, but I would work on the rest of the stuff before you get to the exhuast. Like ignition, fuel, air then exhuast. Since your car isn't making a whole lot more power it's kinda a waist to free up back pressure.

u calling our cars slow!! lol jk i know it is
where could i get ignition stuff? i havnt seen anything where i've been lookin

MSD is what i would get. http://msdignition.com/ they should have the info you need there.