Porsche's last street legal racer
The Porsche 906 Carrera 6 was designed specifically to knock off Ferrari's Dinos. It did exactly that, finishing 4th-7th overall at Le Mans in '66, only losing out to the all-conquering Ford GT40s. Still, the Carrera 6 is a street legal rocket ship that you could use for your daily commute, should you be so inclined, and you can grab one in Arizona at RM's auction.
Performance requirements dictated that the car needed to be as light as Porsche could possibly make it, so it's comprised of just a steel frame, with some seats and a steering wheel thrown in. At just 1,300 lbs, the car's basically a rolling feather with a plexiglass canopy.
As light as it was, the Carrera 6 was also developed in a wind tunnel so it would be as sleek as possible. The nose was super low and designed to go with state-of-the-art 13 inch Formula 1 wheels and tires. However, Porsche happened to have a huge surplus of 15 inch wheels, so they had to redesign the fenders to fit them. First world problems.
Thrust is provided by a 210 hp air-cooled six cylinder, which is enough to shoot the car past 170 mph; of course, traveling at such speeds tends to result in a lot of heat, which is why the car sprouted Doctor Octavius appendages to keep cool.