The detailed aerodynamic work also includes the now almost fully panelled underbody, which must not only meet aerodynamic requirements, but thermal ones as well (heat dissipation). The flat underbody is equipped with specially designed longitudinal fins. These air channellers have been meticulously optimised to ensure optimal air flow to the rear diffuser. The entire package accelerates air flow, significantly increasing downforce. All measures are coordinated and interact with the new rear aerofoil concept. The result of all these measures is a downforce level of well over 400 kilogrammes at 250 km/h.