https://www.google.com/url?sa=t&sour...-ioyXpqf9cisU6
The cD is much less impressive than I had hoped.
With all the flaps and vents optimized for low drag in 'V-Max ' mode, the car has a cD of .388.
I was Immediately reminded of an earlier design that had this kind of plan taper - the Chrysler Aviat.