Thats the Zakspeed Viper, meanwhile that car has become a part of the yearly 24h race......EVERYTIME I went to the Nordschleife I see it there.
It has become the most famous car of the Nordschleife in all the years right after the Falken Skyline GTR (with RWD! The HICAS is removed by that one) and the BMW M3 GT-R.

Zakspeed Racing is not far away from the Nürburgring, so it's good for them they have that track next to their door for testing.

The red viper is just one of the pack.......