spoiler

Is hollow and there's no need in there for you to drill or screw into so if you use like a self-drilling self-threading screw do not over tighten it make sure your clutch is set to almost nothing so it zips in and stops because there's no meat in the spoiler at all It is just hollow and you know it's just sitting on these like clips that's how it's held to the car You should look at some pictures if that interest you but yes it is very hollow and like what would you be screwing in to that spoiler like a high lift racer wing it's not going to last a minute You need to go with quarter 20 bolts and washers all the way through the spoiler but the nuts on the bottom and run them up to touch with some loctite The spoiler is so thin when you run the quarter 20 up to the washers it'll start squashing the spoiler almost immediately