Relocating a bumper or brush gaurd to account for a body lift will depend on how that part attaches to the vehicle. If it bolts to the frame then it will not raise automatically. If it is a brush gaurd attached to the factory bumper, that will raise if you also raise the factory front bumper with one of the standard body lift front bumper brackets. If the bumper attaches to the frame and does not overhang the body, then it is optional if you want to raise it or not, that is, if nothing will hit the bumper and it won't block anything in front of the vehicle, then it can physically be left as-is (see the 1" lift w/ stock height ARB front bumper below). If you want to raise the aftermarket bumper, you'll need to see how the bumper brackets attach to the frame and develop a plan to modify them. Feel free to use any of the examples shown below as a guide.
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