I have to agree about the light bar. Also do the AI removal ASAP. I had mine for several months before I knew about this mod. Wish I have known sooner mabye my headers would be lighter. They are not too bad but it could be better. If the freak mod is to much they are much cheaper air box mods. Do A search and you will find plenty of information.
As for other exterior mods look over the photo post and see what others have done to their rides. I did that a lot and it helped determine which ones I liked and which ones I did not.
