Active aerodynamics is incorporated on many high-end performance cars, improving overall speed and handling characteristics.
Manufacturers make use of different methods to optimise a car's downforce to keep the car firmly planted on the tarmac and do what it's supposed to do.
Genius behind technology
A cool example of adaptive aerodynamics is used in supercars like the Mercedes-Benz SLR McLaren and Bugatti Veyron that have active rear spoilers which moves up and down depending on the car's speed.
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A big downside to implementing advanced aerodynamics on other cars is its cost because you have to keep in mind things like custom parts and mechanics cost much more than the generic build process.