The Porsche GT3 Cup Challenge USA by Yokohama was a one-make racing series based in the United States using Porsche 911 GT3s. The Porsche GT3 Cup Challenge USA by Yokohama entered its 16th & final season in 2020 and was the largest of Porsche's 20 single-make Cup Challenge series in the world. The series produces intense, exciting competition for semi-professional and aspiring professional drivers in the world's most produced and iconic race car, the Porsche 911 GT3 Cup.