International showdown at RMC US Trophy Final International showdown at RMC US Trophy Final Bas Kaligis / Thursday, September 21, 2023 0 561 Article rating: No rating The 2023 Rotax MAX Challenge US Trophy Final has crowned the new champions for this season in some thrilling racing at New Castle Motorsports Park in Indiana. With drivers representing eight nations joining the competition in the five Rotax MAX categories on the program, the international clash produced exciting races in the Final showdown. Read more