Unlike a Bolt Over Billet Grille that sits right on top of your stock grill, a Replacement Billet Grill is a complete transformation. Everything that your auto manufacturer installed in the grill section will be taken off in exchange for your personally chosen new billet grill. This means that you will have to perform a bit of bodywork, but it is not as bad as it sounds. Most stock grills are mounted by plastic brackets, so all you have to do is slice through them with a saw, which should take no more than 30 minutes. Some stock grilles are even easier to remove. All you need to do is to untie the mounting hardware on the factroy grille and remove the factory plastic grille. Once the original is out, your new Replacement Billet Grill takes its place. On certain vehicles, some easy drilling might be needed. Although the Replacement Billet Grills take longer to install, the final result makes the time worth while.