The International Motor Sports Association (IMSA) is a North American sports car racing sanctioning body based in Daytona Beach, Florida under the jurisdiction of the ACCUS arm of the FIA. It was started by John Bishop, a former executive director of SCCA, and his wife Peggy in 1969 with help from Bill France Sr. of NASCAR. Beginning in 2014, IMSA is the sanctioning body of the WeatherTech SportsCar Championship, the premier series resulting from the merger of Grand-Am Road Racing and the American Le Mans Series. IMSA is owned by NASCAR, as a division of the company.
Riley Technologies LLC is an American auto racing constructor and team specializing in the design and manufacture of complete race cars, as well as prototype development for racing and manufacturing applications.
Élan Motorsport Technologies is an American enterprise that serves as an umbrella company containing the race car engineering, development and manufacturing companies owned by American racing and automotive company conglomerate Panoz Motor Sports Group. Élan engineers, designs and builds Panoz-branded race cars and components. Since its founding it has also acquired several manufacturers, including famous Formula Ford builders Van Diemen and IndyCar Series constructor G-Force. Élan-built cars have successfully competed in the American Le Mans Series, Le Mans Series, IMSA Prototype Lites and various other championships, racing series and types of professional racing throughout the world. It designs, develops and manufactures full line race cars, i.e. chassis, bodies, components and engines for professional racing competition for a variety of segments and classes.
The Le Mans Prototype Challenge was a spec sports prototype formula created by the Automobile Club de l'Ouest (ACO), organisers of the 24 Hours of Le Mans, and sports car constructor Oreca. The formula is intended as part of a ladder system for young and upcoming drivers into the world of endurance racing while also serving as a value engineered entry for drivers and teams into Le Mans Prototypes due to limitations on manufacturers and suppliers.
IMSA Prototype Challenge was a racing series featuring two classes of single-seat prototype cars racing simultaneously. The series was sanctioned by the International Motor Sports Association (IMSA). Most races were held in support of the WeatherTech SportsCar Championship. The series raced LMP3 class prototype sportscars. The cars have grown in size and speed since its 2006 introduction, starting from four-cylinder and motorcycle powered race cars to large V8 powered cars. Each race was 1 hour and 45 minutes long apart from the season opening 3 hour race at Daytona International Speedway.
The IMSA SportsCar Championship, currently known as the IMSA WeatherTech SportsCar Championship under sponsorship, is a sports car racing series based in the United States and Canada and organized by the International Motor Sports Association (IMSA). It is a result of a merger between two existing North American sports car racing series, the American Le Mans Series and Rolex Sports Car Series. At its inception, the name was United SportsCar Championship, which subsequently changed to IMSA SportsCar Championship in 2016. Rolex SA's Tudor brand was the championship's title sponsor in 2014 and 2015, and since 2016 WeatherTech has served as title sponsor.
The 2014 IMSA Tudor United SportsCar Championship (TUSC) was the inaugural season of the International Motor Sports Association's new series created out of a merger of the Rolex Sports Car Series and the American Le Mans Series and the first to be held under the name as the Tudor United SportsCar Championship. It began with the 24 Hours of Daytona, the first time since the 1997 IMSA GT Championship season that IMSA sanctioned an event at Daytona International Speedway on 25 January and ended on 4 October at Petit Le Mans. It was the 44th overall season of IMSA GT championship racing tracing its lineage to the 1971 IMSA GT Championship.
The 2015 IMSA Tudor United SportsCar Championship (TUSC) was the second season of the International Motor Sports Association's Tudor United SportsCar Championship and last to be held under that name. It was also the 45th overall season of the IMSA GT championship tracing its lineage to the 1971 IMSA season. It began January 24 with the 24 Hours of Daytona. and ended on October 3 at Petit Le Mans.
The 2017 IMSA WeatherTech SportsCar Championship was the 47th season of the International Motor Sports Association (IMSA) GT Championship that traces its lineage to the 1971 IMSA GT Championship. It was the fourth season of the United SportsCar Championship and second under the name as the WeatherTech SportsCar Championship. It began on 28 January with the 24 Hours of Daytona, and ended on 7 October with the Petit Le Mans.
The 2018 IMSA SportsCar Championship was the 48th motor racing championship sanctioned by the International Motor Sports Association (IMSA). It was the fifth season of the United SportsCar Championship and third to be held under the name as the WeatherTech SportsCar Championship. It began on January 27 with the 24 Hours of Daytona, and ended on October 13 with the Petit Le Mans.
Jeff Shafer is a former racing driver. Shafer competed in USF2000, Atlantic Championship among other series.
The 2018 IMSA Prototype Challenge presented by Mazda is the thirteenth season of the IMSA Lites series and its successors and the second season as the IMSA Prototype Challenge. The season features 6 races across 6 weekends.
The 2019 IMSA Prototype Challenge is the fourteenth season of the IMSA Lites series and its successors and the third season as the IMSA Prototype Challenge. It began on 5 January at Daytona International Speedway, and concluded on 11 October at Road Atlanta. The IMSA Prototype Challenge series is for future IMSA WeatherTech SportsCar Championship drivers and veteran drivers alike. Entering its 14th season, IMSA Prototype Challenge shifts to a single-class, endurance race format in 2019 with six races held on North America’s most premier road courses. The series will continue to feature the global-spec LMP3 prototypes. The endurance format pairs two-drivers per car in a six race season.
The Riley-Multimatic MkXXX, also known as the Riley-Multimatic Mk.30, or simply the Riley Mk.30, is a Le Mans Prototype 2 built to the 2017 FIA/ACO regulations. This car can be raced globally in the European Le Mans Series, Asian Le Mans Series, the FIA World Endurance Championship, and the IMSA sanctioned WeatherTech Sportscar Championship. It made its racing debut at the 2017 Rolex 24 at Daytona, scoring a podium finish, with Spirit of Daytona Racing.
The 2018 Petit Le Mans was the 21st running of the Petit Le Mans, and was held on October 15th 2018. It was the last race in the 2018 IMSA WeatherTech Sportscar Championship, and the last race of the 2018 Tequila Patron North American Endurance Cup, and was run at Road Atlanta in Braselton, Georgia. The race was won overall by the #10 Wayne Taylor Racing Cadillac DPi-V.R.
The 2019 24 Hours of Daytona was an International Motor Sports Association (IMSA)-sanctioned endurance sports car race held at the Daytona International Speedway combined road course in Daytona Beach, Florida, on January 26–27, 2019. It was the 57th running of the race, and the first of 12 races in the 2019 IMSA WeatherTech Sportscar Championship, and the first of four rounds of the 2019 Michelin Endurance Cup. The race was ended ahead of the 22nd Hour, due to heavy rainfall. The race was won overall by Renger van der Zande, Jordan Taylor, Fernando Alonso, and Kamui Kobayashi in the #10 Wayne Taylor Racing Cadillac DPi-V.R. The LMP2 class was won by the #18 DragonSpeed Oreca 07, piloted by Pastor Maldonado, Roberto Gonzalez, Sebastián Saavedra and Ryan Cullen. The GTLM class was won by the #25 BMW Team RLL BMW M8 GTE of Connor de Phillippi, Augusto Farfus, Philipp Eng, and Colton Herta. The GTD class was won for a second consecutive year by the #11 GRT Grasser Racing Team Lamborghini Huracan GT3 Evo of Rolf Ineichen, Mirko Bortolotti, Rik Breukers, and Christian Engelhart.
A Daytona Prototype International (DPi) was a type of sports prototype racing car developed specifically for the International Motor Sports Association's WeatherTech SportsCar Championship, as their top class of car, acting as a direct replacement, and spiritual successor of the Daytona Prototypes. They are named after the main series event, the Rolex 24 at Daytona. The class made its racing debut at the 2017 24 Hours of Daytona.
The Mazda RT24-P also known as the MazdaRoad to 24 – Prototype is a Daytona Prototype International built to the 2017 IMSA DPi regulations. The car is designed and built by Mazda Motorsports, in collaboration with Multimatic Motorsports, and is based on the Riley-Multimatic Mk. 30 LMP2 chassis. This car is eligible for use in the Daytona Prototype International (DPi) class of the IMSA sanctioned WeatherTech Sportscar Championship. It made its racing debut at the 2017 Rolex 24 at Daytona, with SpeedSource Race Engineering, running under the Mazda Motorsports banner. There have been plans to open the car to customer sales, although none have come to fruition so far.
The 2021 SportsCar Challenge at Mid-Ohio, known for sponsorship reasons as the 2021 Acura SportsCar Challenge, was a sports car race held at Mid-Ohio Sports Car Course near Lexington, Ohio on May 16, 2021. The race is the third round of the 2021 IMSA SportsCar Championship, and the first round of the 2021 WeatherTech GT Daytona Sprint Cup.
The 2021 Petit Le Mans was the 24th running of the Petit Le Mans, and was held on November 13, 2021. It was the 12th and final race in the 2021 IMSA SportsCar Championship, and the 4th race of the 2021 Michelin Endurance Cup. The race was be held at Road Atlanta in Braselton, Georgia. This race was the last ever race for the GTLM Class.
Matt Dicken
Nico Jamin 
James Dayson
Roberto La Rocca 
Andrés Gutiérrez
Lonnie Pechnik (M)
Juan Perez