It can be done in about 10-15minutes.
Remove the valence (headlight trim piece)
Unplug fog lights
unbolt horns if needed for more room
Remove the 4 bolts that hold the bumper core brackets to the rails
Remove the bumper cover corner bolts from the fender
pull everything off at once.
I didn't f*** with all the little bolts (snapped each rusted one off) that hold the cover to the bumper itself till I was ready to install the FMIC and then needed to have the bumper cut to fit the new intercooler.
Worked the easiest for me, before I got a JDM bumper.
Rear bumper? Mine didn't seem to want to come off nor did I really care at the time, because I was scrapping the car.