Pirelli World Challenge: Counting the Numbers

Matt Kistler with North American Sportscar gives a rundown of the number of manufacturers and models that are currently participating throughout the seven classes of Pirelli World Challenge. The numbers are impressive to say the least -- 24 makes, 35 models have seen the track, with a 36th coming. Read the story here:

http://nasportscar.com/pirelli-world-challenge-counting-the-numbers/