I only had 1 car without the spoiler and there were no holes, not even dimples to indicate where they went. I had to use the studs as a guide to drill holes and even then the holes needed to be big enough to wiggle the spoiler into place a bit. At least the spoiler covers up the holes area once you are done. Don't forget to use sealer or big rubber washers on the stud side so water doesn't seep into the trunk. The factory used pan type nuts with sealer on the inside, I prefer sealer on the outside, so the studs don't rust.