Grille is used to cover the front opening of the car's body, while allowing air to pass through easily. These grille shape and size depends on the vehicle, and its model. These grille are installed to help protect the radiator and the engine of the vehicle. They act as a barrier and screen, and are also found below the front bumper. They are usually installed to help the brakes cool down, and help get fresh air inside the vehicle through the vents. There are 4 main types of grille, there is radiator grille, bumper skirt grilles that are found at the back and at the front, fender grille to help cool the brakes, hood scoop grille so cool air can enter the vehicle, and roof or trunk grille for rear engine. They have taken different design shape over the year, but their purpose is the same and that is to allow air flow.