The season began on 9 March in St. Petersburg and ended on 2 September at Watkins Glen.
Mid-Ohio and Sonoma were dropped from the schedule in favor of Portland and Watkins Glen.
Laguna Seca, which played host for the Touring Car classes season finale weekend in 2017, will not return to the series.
The pole-sitter also received one point with the exception of the GTA and GTSA classes.
Entries were required to complete 50% of the winning car's race distance in order to be classified and earn points.