Check my car out. Mine is an 03 Gt and I put the 03-04 Cobra Soiler on it not too long ago. When you take the stock Gt spoiler off you have two holes left on the trunk lid which will have to be filled in and repainted (the entrie trunk needs to be repainted) you will also have to drill new holes for the new cobra spoiler. I ended up spending about $650 for the whole thing, body work, paint, the spoiler and cobra brake light. I think I have some pics of the trunk lid. I'll see if I can find them.