GMG Racing tested the Audi R8 LMS ultra at the Circuit of the Americas preparing the 2015 Pirelli World Challenge season.
The car is driven by team's regular Alex Welch, who will compete within the GT-A class in the demanding North American sportscar series.
Here is a look at Alex Welch 2015 Audi R8 LMS ultra livery.
Photo credit: GMG Racing
