If this is a Factory hood scoop, look on the underside of your hood. The stamped bracing will have holes in it that you can drill from the underside. That leaves only needing to get the last 4 corner holes properly lined up. I have placed the scoop on the hood lining it up to the previous drilled holes and marking the last and then drilling them from the top side. Note be sure to prime and paint the sides of any hole you drill to prevent rust.