I think this might be a tougher challenge for you, but with the knowledge on here... probably not! I typed in the number on the back (403095) and the only results I came up with is a guy on eBay selling two of these. He says Oldsmobile Cutlass but does not know the exact application. I used that as a search, but found no results. They almost look like "hood louver" vent trim or some sort of lower vent fender trim? Any ideas?
Thanks again for your assistance. I bought these over 20 years ago, and now don't remember what they were for.