car racing series run by the International Motor Sports Association. The Continental Tire Sports Car Challenge was the support series for GRAND-AM's premier offering, the Rolex Sports Car Series. In 2014 it became the support series for the United SportsCar Championship series upon the merger of the Rolex Series and the American Le Mans Series. The series branded as the IMSA Continental Tire SportsCar Challenge, with Continental Tire having been title sponsor since the 2010 season until 2018. In 2019 Michelin replaced Continental Tire as supplier and title sponsor. This series uses TCR Touring Cars and GT4 cars. IMSA VP Racing SportsCar Challenge The IMSA VP Racing SportsCar Challenge is a development series featuring LMP3 and GT4 cars. The series was introduced in 2023 as a replacement for the IMSA Prototype Challenge series. Races in this series are usually run in support of events for the IMSA WeatherTech SportsCar Championship. Events consist of two 45-minute sprint races with no pit stops or driver changes. Unlike its predecessor series, the VP Racing SportsCar Challenge features multi-class racing with prototypes and GTs on track at the same time. As the series is a development series for higher tier series among IMSA's championships, drivers are required to hold either a Silver or Bronze categorization from the FIA. Porsche Carrera Cup North America The Porsche GT3 Cup Challenge USA by Yokohama is a one-make series dedicated to the Porsche 911 GT3, similar in concept to the Porsche Carrera Cup, held since 2005. Drivers are allowed to race in two different classes, Platinum and Gold. The entries were allowed in the American Le Mans Series starting in 2009, in the GTC Class. The series became the Porsche Carrera Cup North America beginning in the 2021 season. Ferrari Challenge The Ferrari Challenge is a one-make series dedicated currently to the Ferrari 488, which was previously sanctioned by Grand-Am prior to the merger. Lamborghini Super Trofeo The Lamborghini Super Trofeo is a one-make series dedicated currently to multi-class racing, showcasing both the new Huracán LP 620-2 Super Trofeo and the Gallardo LP 570-4 Super Trofeo that was the exclusive car for the first two seasons of the North America championship in 2013 and 2014. The series debuted in North America under IMSA sanction in 2013. Mazda MX-5 Cup The Mazda MX-5 Cup presented by BFGoodrich Tires is the signature spec series for the Mazda Road to 24.