My car was just involved in a accident and both the front and rear bumpers were trashed. I want to replace them with urethane bumpers, the ones I'm interested in are in a catalog my friend gave me. I was wondering if there is anyone who has replaced their bumper with a urethane bumper and how you went about replacing them. I need to know if there are any special brackets or drilling I would need to know about, or can it be placed over the existing bumper. I thank you for any help you can provide.

If these are the bumpers that I saw in Motorsport Auto they are fiberglass and there is a different part no. for the mounting brackets.