Porsche 917/20 "Pink Pig," 1971. A one-off prototype created by Porsche in collaboration with French aerodynamics specialist SERA (Société d’Études et de Réalisations Automobiles), designed by Robert Choulet. As well as its wider track, the 917/20 was designed to combine the strengths of the 917K (short tail) and 917LH (long tail) models in order to reduce drag and improve aerodynamics. The result was a vehicle with an unusually wide and rounded body. The front lip was short and stubby and reminded some of the snout of a pig. It debuted at the 24 Hours of Le Mans test race in April 1971, and went on to the main 24 Hours of Le Mans race which it failed to finish after a brake failure. It never raced again but the car's extraordinary livery has lived on, being used on a Porsche 911 RSR at the 2018 24h of Le Mans – which won the GTE Pro category