What year is your car? The later aero noses have bolt-on molding ends (the bullets) & you can swap out for the smooth ones if yours are ribbed. As mentioned, you have to change out the rear bumper with the smooth molding as it's molded in. The sides will all swap out. You have to pull the door skins to swap out the little moldings behind the door handle - they bolt on from the back.
aka "Tha Driver"Custom Fiberglass Parts