So, if I understand you correctly, I can use up to 2006 plastic on a 1999? I thought that there was some change to the frame in 2002. I know when you do a search on parts, it looks like 98 thru 01 is the same - then 02 through 06 - then 07 to current model. But again - I don't have a clue - I'm just trying to learn.