The Front Spoiler does not come predrilled because it allows people to mount them in different ways. They can be mounted like the original but the holes need to be drilled. You would basically place them and mark where the holes would go. Using a regular, sharp drill will work. Make sure the part is set on a block of wood when drilling and don't go too fast. Sometimes it is a good idea to drill smaller holes than is needed and file out as necessary.