well if you're wanting the real deal, headers will run you anywhere from 1000-1500$ and 500-1000 on the exhaust like 'jcns' said, search the forum (some of the veterans on the site will pick you apart lol) Now im sure you already know this, but there is an alternative to getting SS or AA headers or whomever you choose to buy from. Ebay headers, and they're just replicas of Supersprint, AA ect.. they normally run anywhere from 75 -300$ ( i have ebays and I bought them from someone at angie fest, make sure you get a garunteed fit also).
Koni FSD, eibach sports
E30 S52B32 100,xxx
5spd ZF, JB LW fly, Megan Coils, OBD1 conv. Mishimoto with low temp stat, TRM 15x8, Black vinyl sport seats, MOMO mod 08, 2:93 LSD, Custom single 2.5" exhaust, SS headers, M3 rack, basically new everything on driveline.