I just wanted to correct something of a misstatement made earlier. The vortex generators are not, necessarily, designed to work only with the rear airfoil on the EVO. By decreasing the flow separation across the rear window, vortex generators allow more "clean" air to hit the airfoil (allowing the airfoil to more effectively produce downforce). Even if the airfoil weren't there, the car would benefit from the reduction in flow separation.
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