A set of urethane wheel-well extensions (Gap-Guards 2wd & 4wd PN-6527) are available separately, and are used to conceal any gaps between the body and frame in the wheel wells. For the rear bumper area a one piece rear bumper urethane Gap-Guard is available separately (Rear Bumper Gap-Guard PN-6739) and is used to conceal the gap between the tailgate and the rear bumper.