How do you think they stay on?

There's a mounting plate inside the fender. You hunk of plastic is what the screws that hold the reflector in place screw into.

You go behind the fender and unscrew the reflector. Pull out the stock one, put in the CF one, replace the screws. Easy as pie.

Except for the passenger one, which you can barely reach because the squirter bottle gets in the way, which will cause much anger and swearing.

 

^i took my bumper off...theres a how to on it...