I was just watching HDnets Why We Race: The Mustang Challenge and there was a pretty prominent GRM appearance. One of the Mustangs (one of the mostly white cars, not sure what team) has large GRM stickers on the rear quarters and a big one on the hood.
Not sure what team it was but the car was running mid rear in the first race (Road Atlanta), not sure if it finished. There was a full screen shot of it when they were showing the practice at Road Atlanta.
What's the story?

