33 Vitaphone Racing Team DHL Maserati of the Italians Alessandro Pier Guidi and Matteo Bobbi, leading the No.
Michael Bartels and Andrea Bertolini secured the GT1 Drivers' Championship with their third-place finish.
60 Prospeed Competition Porsche, with Westbrook securing the GT2 Drivers' Championship.
However the two cars on the front row were penalized for setting their fastest lap while a portion of the track was under yellow flag conditions.
Cars failing to complete 75% of winner's distance marked as Not Classified (NC).