Porsche 904 GTS
Produced for just two years (1964/65) Porsche 904 GTS was a racing car for the street. It was designed especially for the track but only homologated as a road car. The flat-four engine was positioned behind the driver and displaced 2.0 liters with a high output of 180 HP. Since this was a racing car, the exhaust was uncorked, which provided 904 with glorious noise (via Supercars).
The GTS was the evolution of the Porsche racing logic and paved the way for more extreme and much faster models like the 908 and the legendary 917.