The GT World Challenge America is a North American auto racing series launched in 1990 by the Sports Car Club of America. It has been managed by the Stephane Ratel Organisation since 2018, and has been sanctioned by the United States Auto Club since 2017.
The Flying Lizard Motorsports group is a motorsport team from Sonoma, California, formed by Seth Neiman in early 2003. The team competed in the full American Le Mans Series season, as well as the 24 Hours of Daytona, and the 24 Hours of Le Mans. The team went on to win six driver and team championships in the American Le Mans Series, becoming a Porsche factory team and Porsche Motorsport North America's development partner from 2007 to 2012. The team helped develop the first- and second-generation 997 GT3 RSR as well as bring it to victory several times in its six-year run in the series. The team solely raced Porsche cars from 2004 to 2019, becoming a staple in the Porsche racing community.
The 2014 Pirelli World Challenge season was the 25th season of the Pirelli World Challenge championship. It marked the debut of a new "Touring Car A-Spec" class. A new "GT A-Spec" class also made its debut. These new classes featured amateur drivers. The series also held a round at Brainerd International Raceway for the first time in its history, with a touring car doubleheader held in support of a Trans Am Series event; also making its series debut was Barber Motorsports Park. The GT groups competed in sixteen fifty-minute sprints on nine circuits. The touring cars competed in fourteen sprints on seven road courses. The first race for GT cars at St. Petersburg was canceled due to heavy rain, so a make-up race was added for the series finale at Miller Motorsports Park. The second race for touring cars at Barber was also canceled due to rain, so a make-up race was added to the schedule at Mosport.
Lawson L. Aschenbach is an American professional racing driver. He is a four-time Pirelli World Challenge champion, and most recently, the 2014 Pirelli World Challenge GTS Champion. He is the 2006 SPEED World Challenge Rookie of the Year and became the first person to win the SPEED GT Championship in his rookie season. He is also the champion of the 2010 Grand-Am Continental Tire Sports Car Challenge ST Championship and 2014 Lamborghini Super Trofeo ProAM World Champion. Aschenbach first raced professionally in 2005. He currently races for Stevenson Motorsports in the IMSA Continental Tire Sports Car Challenge.
The 2016 Pirelli World Challenge was the 27th running of the Sports Car Club of America's World Challenge series. Johnny O'Connell was the defending champion in the highest class, the GT class.
The 2016 SprintX GT Championship Series was the inaugural season of the SprintX GT Championship Series. The series was managed by WC Vision and sanctioned by the Sports Car Club of America (SCCA). On May 28, 2015 WC Vision announced it would be launching the SprintX GT Championship Series as a support series of the Pirelli World Challenge. Similar to GT races in the PWC, SprintX races had a sprint format as races were 60 minutes in length. The difference between PWC GT races and SprintX races was that SprintX races featured mandatory driver and tire changes.
The 2017 Pirelli World Challenge was the 28th running of the Pirelli World Challenge. Álvaro Parente was the defending champion in the highest class, the GT class. It was the first season sanctioned by the United States Auto Club, after being under Sports Car Club of America sanctioning for the previous 27 seasons.
Michael Cooper is an American-born race car driver who currently competes in the Pirelli World Challenge. He resides in Huntington, New York, and also has a business management degree from at NYIT, and a nutrition degree from Long Island University.
The 2018 SprintX GT Championship Series is the final season of the SprintX GT Championship Series. Michael Cooper and Jordan Taylor are the defending champions in the highest class, the Pro class in GT. It is the second season sanctioned by the United States Auto Club. The season began on 23 March at Circuit of the Americas and will end on 12 August at Utah Motorsports Campus. GTS cars are separated from GT and GT Cup, as the GT4-based category has its own races this season.
The 2019 Blancpain GT World Challenge America was the 30th season of the United States Auto Club's Blancpain GT World Challenge America. It was the first under Blancpain sponsorship, taking over from the longtime Pirelli sponsorship, as part of the standardisation of names of Stéphane Ratel Organisation-run GT3 sprint racing series globally, following the series' acquisition by the SRO Motorsports Group. It was also the last under Blancpain sponsorship, after they and the SRO concluded their partnership at the end of 2019. The season began on 2 March in Austin and ended on 20 October at Las Vegas.
The 2019 Pirelli GT4 America Series was the inaugural season of the GT4 America Series. It took over the GTS class of the Pirelli World Challenge, which adopted global GT4 technical regulations in 2018, and it is a Blancpain GT World Challenge America support series. GT4 America Series is split into a Sprint series, which features 50-minute races with one driver per car, and a SprintX series, which features one-hour races with two drivers per car and a mandatory driver change during Pit stops. Also East and West regional championships are awarded. The season began on 2 March in Austin and ended on 20 October in Las Vegas.
The GT4 America Series is a sports car racing series based in the United States. In 2019, the series was relaunched with the explicit GT4 title, following the alignment in 2017 of the Pirelli World Challenge series "GTS" class with SRO GT4, and the Stéphane Ratel Organisation assuming control of the series in May 2018. It is a GT World Challenge America support series, managed by SRO and sanctioned by the United States Auto Club.
Alec Udell is an American racing driver from Houston, Texas. He has won the 2019 SRO GT4 European series Silver cup championship, the 2016 Pirelli World Challenge GT3 Cup championship and the 2013 Nasa Pro American Iron National Championship.
The 2020 GT World Challenge America powered by AWS is the 14th season of the United States Auto Club's GT World Challenge America, the third season under ownership of the SRO Motorsports Group and the first season without Blancpain sponsorship. The season began on 7 March in Austin and will end on 4 October at Indianapolis.
Jade Marcus Buford is an American professional racing driver with experience in open-wheel, sports car, and stock car racing. He competes part-time in the NASCAR Xfinity Series, driving the No. 5 Chevrolet Camaro for Big Machine Racing.
The 2021 Pirelli GT4 America Series is the third season of the GT4 America Series. The season began on 5 March at Sonoma Raceway and ended on 17 October at Indianapolis Motor Speedway.
James Sofronas is an American racing driver and the founder of Global Motorsports Group.
Harry Gottsacker is an American racing driver who currently competes for Bryan Herta Autosport in the TCR class of the Michelin Pilot Challenge.
The 2022 Northeast Grand Prix was a sports car race sanctioned by the International Motor Sports Association (IMSA). The race was held at Lime Rock Park in Lakeville, Connecticut, on July 16, 2022. This race was the ninth round of the 2022 IMSA SportsCar Championship, and the sixth round of the 2022 WeatherTech Sprint Cup.
Stevan Gordon McAleer is a British racing driver who competes in the IMSA SportsCar Championship, GT World Challenge Europe, and Michelin Pilot Challenge.
DXDT Racing
Dani Clos 
Marko Radisic
Alessandro Bressan
Yuki Harata
Kyle Tilley 
Cameron Cassels