8.The Frontier grille shell can now be snapped back in the truck, and you're done. On the Titan, close the hood slowly and check for clearances. Make sure the hood does not contact the grille before you tighten it in place. As you can see by the initial images, the grilles really help make these trucks look sweet, and don't require a lot of wrenching experience. Now you know why a billet grille is pretty much the standard when it comes to modified trucks.