The protruding splitter reduces negative lift at the front, wide rocker panels smooth out airflow between the axles, and big slots in the fenders direct air around each of the four carbon - ceramic brake discs to help them deal with the claimed top speed of 217 mph. (automobilemag.com)
Also, at moderate and high flight speeds, the circulation on the outer (hand) wing and the arm wing differed in sign during the upstroke, resulting in negative lift on the hand wing and positive lift on the arm wing. (science.sciencemag.org)
Honda claims an overall effect of negative lift for the Type R at speed. (roadandtrack.com)