Group GT3, known technically as Cup Grand Touring Cars and commonly referred to as simply GT3, is a set of regulations maintained by the Fédération Internationale de l'Automobile (FIA) for grand tourer racing cars designed for use in various auto racing series throughout the world. The GT3 category was initially created in 2005 by the SRO Motorsports Group as a third rung in the ladder of grand touring motorsport, below the Group GT1 and Group GT2 categories which were utilized in the SRO's FIA GT Championship, and launched its own series in 2006 called the FIA GT3 European Championship. Since then, Group GT3 has expanded to become the de facto category for many national and international grand touring series, although some series modify the ruleset from the FIA standard. By 2013, nearly 20 automobile manufacturers have built or been represented with GT3 machines.
GT3 cars must be based on mass production road car models that are being built and sold at the time of homologation, which does not necessarily include the engine (e.g. the BMW Z4 GT3 used the 4.0L V8 from the BMW M3 E92, while the Mercedes-AMG GT3 the 6.2 V8 from the Mercedes SLS AMG GT3). Apart from that, Group GT3 allows for a wide variety of car types to be homologated with almost no limit on engine sizes and configurations or chassis construction or layout. Performance of all the Group GT3 cars are regulated, either by the GT Bureau of the FIA or by a series' specific ruling body, through the balance of performance formulae that adjusts limits on horsepower, weight, engine management, and aerodynamics to prevent a single manufacturer from becoming dominant in the class. The cars in GT3 are designed to have a weight between with horsepower between . All cars have a very similar power to weight ratio but achieved either by high power and high weight such as the Mercedes-Benz SLS AMG or low power and low weight such as the Porsche 911 GT3. GT3 cars also have traction control, ABS, and built-in air jacks for quick pit stops.
History The concept behind Group GT3 was introduced by Stéphane Ratel, head of the SRO Group and promoter of the FIA GT Championship in 2005. The Group GT1 and Group GT2 cars in the FIA GT Championship required manufacturers to build a car based on regulations, and then develop that car to increase its performance, thus increasing the cost for the manufacturers and the customers wanting to race the cars. GT3 was envisioned as a category that would simplify the process by combining several existing cars from one-make series, such as the Porsche Supercup or Ferrari Challenge, as well as other race cars available from manufacturers that did not fit in GT1 or GT2, such as the Aston Martin DBRS9 or Dodge Viper Competition Coupe, and allow them to all compete on a level playing field through strict control of their performance by the FIA. This would allow drivers a bridge between smaller national series and the professional international FIA GT Championship. Further, the category was conceived to use sprint formats for races, but manufacturers could develop and sell an upgrade kit for their cars to allow GT3 cars to be used in endurance races. A similar category, under the same name, had been in use in the British GT Championship which the SRO Group also organized.
The regulations and homologations for Group GT3 were prepared by the FIA and ready by the start of the 2006 season, with eight manufacturers represented as the first Balance of Performance test prior to the debut of the FIA GT3 European Championship. The International GT Open, British GT Championship, Spanish GT Championship, and Italian GT Championship all created a category specifically for the FIA's new Group GT3 machines. The SRO Group expanded the category in 2007 with the launch of two new regional championships, the Brazilian GT Championship and the German ADAC GT Masters, exclusively running Group GT3 cars. The British GT Championship abandoned Group GT2 cars, promoting GT3 to their premiere category, while the Belcar series reorganized their class structure to introduce GT3 as their lead class. The French FFSA GT Championship also added a new GT3 category.
The Australian GT Championship brought on board the GT3 category in 2008 while the VLN Series and 24 Hours Nürburgring added GT3 categories in 2009. By 2011 Group GT3 was expanding into endurance racing with the formation of the Blancpain Endurance Series as well as winning overall at the Bathurst 12 Hour, Dubai 24 Hour, Malaysia Merdeka Endurance Race, and Spa 24 Hours, followed by a 24 Hours Nürburgring victory in 2012. Group GT3 also expanded to the United States with the Rolex Sports Car Series allowing several GT3 cars with specification wings, as well as the Japanese Super GT and Super Taikyu Series, while Nissan became the first Japanese manufacturer to sell a GT3 car. GT3 category cars also replaced Group GT1 cars in the FIA GT1 World Championship before rebranding as the FIA GT Series in 2013. After NASCAR merged their Grand-Am Rolex Sports Car Series with IMSA's American Le Mans Series, the new United SportsCar Championship allowed more types of GT3 cars to join the GTD category, and in 2016 limited the category to only GT3 spec machines.
On 9 March 2018, it was announced that the FIA World Motor Sport Council approved the introduction of a new process, in which a minimum production number required for GT3 race cars would be enforced. Ten units must be made within twelve months as from the homologation date, twenty units must be made within twenty-four months and so on. Following dwindling manufacturer support for their Class One regulations, the Deutsche Tourenwagen Masters (DTM) series switched to the GT3 formula in 2021, abandoning its touring car origins. In 2022, the FIA confirmed that the GTE cars in the FIA World Endurance Championship would be replaced by GT3 cars, racing in the LMGT3 class. This means GT3 cars will be able to participate in the 24 Hours of Le Mans from 2024 onward.
Homologated cars
As of April 2026, 59 vehicles have gone through the homologation process with the FIA, although some of these homologations failed to be completed or were later revoked. Homologations expire after a period of seven years unless a request for extension is made by the manufacturer. Currently, all homologations prior to GT3-030 have expired and not been renewed, although these expired cars are allowed to compete in national series under local approval (such as SCCA Trans-Am Series XGT classes) or in historic events such as Le Mans Classic. One such championship, the GT3 Revival Series, uses cars homologated between 2006 to 2009 and between 2010 to 2013, which are each classified as "Gen I" and "Gen II", respectively.
Group GT3 cars can be built either directly by the automotive manufacturer or built by racing teams and tuning companies at the behest of the manufacturer. Other vehicles have been allowed to run alongside Group GT3 cars in various series under homologations from national ruling bodies, including the Mosler MT900R GT3, Ginetta G55 GT3, Chevron GR8 GT3, Radical RXC GT3, Scuderia Cameron Glickenhaus SCG 003C, Emil Frey's Jaguar XKR G3, Acura TLX-GT, Renault Sport R.S. 01 GT3, Aston Martin Vulcan AMR Pro, Chevrolet Corvette C8.R GTD, and JAS Motorsport's Honda NSX GT3 Evo25. As of January 2026, 19 vehicles currently hold valid homologation for use in competition by the Fédération Internationale de l'Automobile.
Homologation # Manufacturer Model Developer Photo Notes GT3-001 Maserati Coupe GranSport Light Italtecnica 1 October 2006 31 December 2019 GT3-002 Dodge Viper Competition Coupe Oreca 1 October 2006 31 December 2019 GT3-003 Aston Martin DBRS9 Prodrive 1 November 2006 31 December 2019 GT3-004 Lamborghini Gallardo LP520 GT3 Reiter Engineering 1 November 2006 31 December 2019 GT3-005 Corvette Z06.R GT3 Callaway Cars 1 May 2007 31 December 2019 GT3-006 Ascari KZ1-R GT3 Ascari 1 March 2007 31 December 2019 GT3-007 Porsche 911 GT3 Cup Porsche Motorsport 1 April 2007 31 December 2019 997 generation 911 GT3, 2006 model only GT3-008 Venturi GT3 Heritage Venturi 1 December 2008 31 December 2019 GT3-009 Ferrari F430 GT3 Kessel Racing 1 March 2007 31 December 2019 GT3-010 Ford Racing Mustang FR500C GT Multimatic Motorsports 1 May 2007 31 December 2019 GT3-011 Ford GT GT3 Matech Concepts Not available 30 April 2008 Homologation rescinded, replaced by GT3-016 GT3-012 Jaguar XKR GT3 Apex Motorsport none Homologation failed GT3-013 Morgan Aero 8 GT3 AutoGT Racing 1 September 2007 31 December 2019 GT3-014 Lotus Exige GT3 Lotus Sport 1 October 2007 31 December 2019 GT3-015 Porsche 911 GT3 Cup S Porsche Motorsport 1 April 2008 31 December 2019 GT3-016 Ford GT GT3 Matech Concepts 1 May 2008 31 December 2019 Engine design was changed from GT3-011 GT3-017 Audi R8 LMS Audi Sport 1 May 2009 31 December 2019 Includes: R8 LMS ultra GT3-018 BMW Alpina B6 GT3 Alpina 1 May 2009 31 December 2019 GT3-019 Ferrari 430 Scuderia GT3 Kessel Racing 1 May 2009 31 December 2019 GT3-020 Dodge Viper Competition Coupe Series 2 Oreca 1 May 2009 31 December 2019 GT3-021 Jaguar XKR-S GT3 Apex Motorsport none Homologation failed GT3-022 Morgan Aero Super Sport GT3 AutoGT Racing 1 May 2009 31 December 2019 GT3-023 BMW Z4 GT3 BMW Motorsport 1 May 2010 31 December 2019 GT3-024 Lamborghini Gallardo LP600+ GT3 Reiter Engineering 1 May 2010 31 December 2019 Includes: Gallardo FL2 GT3 Gallardo R-EX GT3-025 Porsche 911 GT3 R Porsche Motorsport 1 May 2010 31 December 2024 997 generation 911 GT3 GT3-026 Corvette Callaway Z06.R GT3 Callaway Cars 1 May 2010 31 December 2019 GT3-027 Ford Mustang VDS GT3 Marc VDS Racing Team none Homologation failed GT3-028 Mercedes-AMG SLS AMG GT3 Mercedes-AMG 1 May 2011 31 December 2019 GT3-029 Ferrari 458 Italia GT3 Ferrari Competizioni GT 1 May 2011 31 December 2024 GT3-030 Nissan GT-R Nismo GT3 Nismo 1 April 2012 31 December 2026 GT3-031 McLaren MP4-12C GT3 McLaren GT 1 April 2012 31 December 2019 GT3-032 Aston Martin V12 Vantage GT3 Prodrive 1 May 2012 31 December 2019 GT3-033 Chevrolet Camaro GT3 Sareni 4 April 2012 31 December 2019 GT3-034 Maserati GranTurismo MC GT3 Swiss Team 1 November 2013 31 December 2020 GT3-035 Bentley Continental GT3 M-Sport 1 April 2014 31 December 2023 Second-generation Continental GT GT3-036 Dodge Viper GT3-R Riley Technologies 1 January 2015 31 December 2022 GT3-037 McLaren 650S GT3 McLaren GT 1 February 2015 31 December 2022 GT3-038 Audi R8 LMS Audi Sport 1 May 2015 31 December 2031Second generation R8
Includes: R8 LMS Evo R8 LMS Evo II GT3-039 Cadillac ATS-V.R GT3 Pratt & Miller 1 August 2015 31 December 2022 GT3-040 Lamborghini Huracán GT3 Lamborghini Squadra Corse 1 December 2015 31 December 2023 Includes: Huracán GT3 Evo GT3-041 Porsche 911 GT3 R Porsche Motorsport 1 March 2016 31 December 2025 991 generation 911 GT3 GT3-042 Mercedes-AMG GT3 Mercedes-AMG 1 March 2016 31 December 2029 Includes: GT3 Evo GT3-043 BMW M6 GT3 BMW Motorsport 1 March 2016 31 December 2023 GT3-044 Ferrari 488 GT3 Ferrari Competizioni GT 1 March 2016 31 December 2028 Includes: 488 GT3 Evo 2020 GT3-045 Corvette Callaway Corvette C7 GT3-R Callaway Cars 1 June 2016 31 December 2026 GT3-046 Toyota Lexus RC F GT3 Toyota Gazoo Racing 1 January 2017 31 December 2032 GT3-047 Honda Acura NSX GT3 JAS Motorsport 1 March 2017 31 December 2029 Includes: NSX GT3 Evo NSX GT3 Evo22 GT3-048 Nissan GT-R Nismo GT3 Nismo 1 April 2018 31 December 2032 Second-generation GT-R GT3-049 Bentley Continental GT3 M-Sport 1 April 2018 31 December 2031 Third-generation Continental GT GT3-050 Porsche 911 GT3 R Porsche Motorsport 1 February 2019 31 December 2028 991.2 generation 911 GT3 GT3-051 Aston Martin Vantage AMR GT3 Prodrive 1 March 2019 31 December 2031 Second-generation Vantage Includes: Vantage AMR GT3 Evo GT3-052 McLaren 720S GT3 McLaren Motorsport 1 April 2019 31 December 2030 Includes: