As the SRO takes a controlling interest in Pirelli World Challenge and becomes more integrated into SRO’s global GT racing platform, the series is looking at the biggest format change in its three-decade history for 2019. The GT class for GT3 cars moves to 90-minute, two-driver races for all events, and the GTS class reverts to 50-minute sprint events exclusively. There will also be a 60-minute SprintX-format series for GT4 cars called GT4 Americas, which will have separate East and West Coast championships of five races each. The Touring Car classes — TCR, TC and TCA — remain mostly unchanged except for an expanded schedule.

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