I have had my Titan for about a year now and love it. I have taken care of some of the basic stuff to dress up the exterior, but now I am looking at some basic performance mods. Stuff like a leveling kit, cold air kit, etc. Has anyone had problems with waranty repairs after doing stuff like this? I don't want to hear that I can't get my brakes fixed because I put in a leveling kit. You guys know how some dealers are. So that's the question, have your dealers been suportive and cooperative about these mods (good looking and performing trucks helps them sell more trucks) or do they see them as an out to send you on your way?