What offset are your 18's? i have 18's on my 97 gli sedan and they fit fine i only scrub on my outer gards because i have 40mm offset rims(getting the outsides lipped soon) If your wheels are a >35 offset you need to change your offset and you will be fine. The optimal is 38 but 40 was the closets my style came in. hope this helps mate but your problem is just as bad as mine