if you can build that quality on your own with carbon fiber...wauw epic! I think it's an extension piece for a standard spoiler. but i was wondering what's it called or by what factory it's builded.
Thought I recognised the styling (The purple on the rims)...
Pretty sure it's a custom job, but that guy is the first guy to sport a Flugel front lip, so that rear wing extension might be a prototype/one-off from the same company... Maybe