I'm going to install a saleen wing on my 2000 mustang. i like the one piece wing s281, but there are apparently 2 styles. One is 99-00 and the other is 2001-2004. Is there any difference? They look identical. I've looked at 2000 saleens and 2003 saleens on cardomain and the spoilers look the same. I really can't see one unless the only difference is where the holes line up in the trunk. Can someone please help me distinguishing between the 2.