The average car has exposed working gear under the car, where wind whips around, creating lift, and slowing you down. The Nissan GT-R, of course, isn’t an average car. Its underbody is virtually covered by composite panels, giving it a flat, aerodynamic surface. At the front of the car, the flat underbody is accelerating the air and channeling it over the brakes, cooling them down. At the back, a carbon-fibre diffuser takes that accelerated air and slows it down, creating a vacuum effect that helps the Nissan GT-R stick to the road, while a new duct in the diffuser helps cool the titanium exhaust.