Hmm.....maybe Im missing something but its not one of those aircraft wings that I have seen bolted to trunks and even people's hoods. It looks like the litttle duckbill that goes on the rear window of a hatchback. I think there are some BMWs that have something similar. Something like this
http://www.jdmshit.com/parts/exterio...ckbill_car.jpg
but for a coupe.