To be fair, it was $5.76 at the local pick-n-pull. Came off some kin dof late '90's Pontiac, Sunbird maybe?
I was more interested in adding high-speed stability, and it definitly does the job, think it looks pretty good, too. Just have to clean it up a little.
Stainless self tapping panhead screws with reinforcement plates to spread the load on the ends. Fabbed up plates from aluminum stock that attach to factory holes on the bottom of the radiator support and connect to existing holes on the air dam. Wanted to be absolutely sure the mounting was very secure and stable, so it's probably over done.