By the rules you can't change or remove any part of the bumpers. Not allowed. On some older cars this can be a problem as some of the parts are no longer available to replace damaged or missing parts.

I have tried to keep my bumpers stock as best as i can but I ended up using some screws to hold the front bumper cover to the steel support beam as 90% of the plastic tabs that should hold it on are broken off. I also glued the filler strips on as well as some of the stock attachment are gone too.