Whether or not it has improved motor racing is debatable, but the adoption of aerodynamics has given the sport some totally wild creations.

Chaparral 2J
Peugeot 208 T16
Audi S1 E2 Quattro
Nissan Deltawing
Lotus F1 Type 49B
Brabham BT46B
Mclaren P1
Ferrari F2008
BMW M4 DTM