did you see the 1969 Hurst Olds prototype?

they called this rear wing the "elephant tusk" spoiler

https://classicoldsmobile.com/forums/general-discussion/130999-1969-hurst-olds-prototype-clone-mcacn.html
https://levelonerestoration.com/portfolio-view/1969-hurst-olds-prototype/
https://www.hemmings.com/blog/article/detective-stories-1969-oldsmobile-hurst-olds/