Superb sporting clashes in the Heats and Prefinals Superb sporting clashes in the Heats and Prefinals Bas Kaligis / Saturday, December 12, 2020 0 2199 Article rating: No rating The weather improved greatly during the Prefinals of the Rotax MAX Challenge International Trophy in Portimão and the variations in grip seen since the Qualifying Heats resulted in races as exciting as they were selective in all categories. Read more