I had 18s on my 90 and it was fine for a while. After a while I started noticing excessive inner tire wear. I ended up installing an SPC anchor bolt kit that cleared the problem up. I wasn't lowered either. I have since sold the car and have a 94 that I ran the 18s on for a while and they were fine; I didn't need a camber kit when the 18s were on the 94. If you're thinking of going 18s it's possible you MAY need a camber correction kit, but then again you may not.