I just bought a 06 f150 x-cab flareside fx4 5.4L about a month ago and just installed my Whelen csp90 competitor series hideaway kit out of my last truck last week. I put 4 strobes in the rear, 2 in the reverse lights and 2 in the reflector on the top of the tailight. I need to get 2 more for the front. But anyway it looks awsome.I will try to post a video of it. The next investment is going to be a plow.