<strong>03. </strong> The frame brackets bolt into the original bumper mounting holes on the frame. Each bracket uses four new grade-8 bolts to attach the bumper to the bracket. We found it easiest to put the brackets on the frame first, and then bolt the whole unit up onto the frame (tightening the bolts after it was placed on the frame). Rear Fab Fours Chevy, Dodge, and Ford bumpers all mount very similarly.