Chip Ganassi Racing's two car team steals front row as Pruett edges out Dixon. Tandy in a Porsche claimed the GT pole and Lewis took the pole in the new GX class.
Alex Job Racing, Magnus Racing, TRG and Brumos are among the Porsche 911 GT3 customer teams. Seven of the 10 Porsche factory drivers are in the field, along with 10 previous winners.
The 2013 final battles will take place this weekend for both the GRAND-AM Rolex Sports Car Series and the Continental Tire Sports Car Challenge.
Magnus Racing Porsche driven by Andy Lally and John Potter take the win in the GT class.
Defending Rolex 24 DP and GT winners were the fastest in the opener of three days of January testing. Donohue was fastest in the new GX class.
In the new Rolex GRAND-AM GX class, Shane Lewis, David Donohue, Dr. Jim Norman, and Nelson Canache won the inaugural race in a Porsche Cayman.
GRAND-AM's Continental Tire Sports Car Challenge put on a good show in the series debut race at Road Atlanta.
Kansas Speedway will host the GRAND-AM Rolex Sports Car Series for the first time on Saturday night. In the Continental Tire Sports Car Challenge, Plumb and Longhi can clinch the GS title in Kansas City.
The Rolex Sports Car Series head to Road America with Alex Popow and Ryan Dalziel holding the Grand-Am points lead in the Daytona Prototype class.
Porsche drivers take the top four GT positions in qualifying.
GT class stronger than ever, Porsche teams claim 6 of to 10 testing times.
Borcheller, LaMarra Score First ST Victory For Burton Racing.
Porsche customers place three 911 GT3 cup cars in GRAND-AM Indy top 10.