Manufacturers are also given more freedom to maximise aerodynamic performance , large brake cooling ducts in fairings forming enlarged wheel arches .
Manufacturers are also are allowed to use electronically - controlled active centre differentials , while the front and rear differentials remain mechanical .
Manufacturers are also given more freedom to maximise aerodynamic performance , large brake cooling ducts in fairings forming enlarged wheel arches , and are allowed to use electronically - controlled active centre differentials , while the front and rear differentials remain mechanical .