In the main TA class, the top four championship positions as well as all race victories were taken by drivers competing in Chevrolet Corvettes. It was won by defending champion Doug Peterson, who won five races over the course of the season. Peterson won the championship by 33 points ahead of 2012 champion Simon Gregg, who finished every race with a top-five finish without winning a race. One point further behind in third place was Amy Ruman, who won races at New Jersey Motorsports Park and Daytona International Speedway; Ruman's latter victory ensured she became the first woman to claim a solo overall victory in a professional automobile race at Daytona. Other victories were taken by drivers who did not contest the whole season; Paul Fix won successive races at Lime Rock and Virginia International Raceway, while R. J. López and Ron Fellows won on one-off appearances at Homestead and Canadian Tire Motorsport Park respectively.
