You can not just change to the 4.8is body kit or bumpers alone. You will have to change the entire front end! This means the hood, grill, headlights, side fenders, bumpers, front spoiler, etc. Not an easy mod for sure. The only people that have done it was after a front end collision and insurance was paying for the damages... otherwise it's just not worth it. Now don't get any ideas and crash the front end of your truck!