Hold it up to the front of your car and use masking tape to hold it level before drilling a centre hole. Fix with a self tapping screw then make sure you have the spoiler level before drilling the rest of the holes.
Hold it up to the front of your car and use masking tape to hold it level before drilling a centre hole. Fix with a self tapping screw then make sure you have the spoiler level before drilling the rest of the holes.