[aerohead]

I have no idea what the top speed of the Precept was considered for, but on some 'hot-lap', 'track' cars, the extractor vent on the bonnet allows the air to evade the engine bay, where otherwise, cooling air striking the firewall could produce front lift.
The aerodynamics of high-end Camaros and Mustangs focus primarily on thermal management and high-speed stability, at the cost of pickup truck drag coefficients.