Urethane bumper install basics...
Measure, Measure, Measure........ Now drill that hole
Seriously though you really need to take your time and line everything up to get a good job. And no the urethanes I purchased did not come with holes. You have got to drill each hole. I reccomend you purchase new hardware for the install. you know the funny little fasteners that are plastic and act like a wedge anchor. Get new ones. If you are using the front fender trims be careful to not spin out the threads in the screws. Use a drill to pre-drill the holes and then hand tighten with a screw driver. Add a little dab of black RTV sealant when you do the final install after paint to those fender trims and the screws will stay in place and not back out. Make sure your bumpers are fit just the way you like em before painting. *** assemble, Paint, Re-install
Good luck