When in doubt, try a magnet The hood is thin, but has been reinforced underneath to add a lot of strength over such a relatively large surface...I bet the other side has the holes, etc. for the regular CTS, maybe? I still say GM is cheap anyway they can, lol, but yeah it's probably not needed though. If you were to put two, maybe have each one less 'pressure' than the oem. I know this isn't an issue, but my only concern with using one is that the hood could possibly get tweaked, but again there is so much support built in to the middle via those round supports, don't think it would ever be an issue.That threw me at first, also, because the mounts are there for another support. Is the hood aluminum? It was on my RX-8, but I didn't know it was on the Caddy!