# SRO GT4

SRO GT4 is a class of grand tourer racing cars maintained by the SRO Motorsports Group that race in various auto racing series across the globe. It is an entry-level class aimed at amateur drivers. GT4 cars are production-based vehicles with a few modifications for racing. The cars are closer to their road legal counterparts than most other GT racing classes; they are also one of the least powerful GT categories. The class uses a balance of performance system to provide close competition between different race cars.

## History

The GT4 category was founded by the SRO at the end of 2006, and first introduced in 2007, racing in the GT4 European Cup as a cheaper alternative for GT3 racing. The category was also added to the British GT Championship in 2008. The SRO also founded the Dutch GT Championship in 2009. The GT4 class was also adapted by several other small national championships.
After an unsuccessful attempt to expand the category in 2012, the SRO introduced the GT4 European Trophy, consisting of five rounds from existing European Championships. This replaced the GT4 European Cup. In 2014, this series merged with the Dutch GT4 Championship to form the GT4 European series.
Due to a low number of entries, the SRO announced that the GT4 European series would be split into two championships, the GT4 European Series Northern Cup and the GT4 European Series Southern Cup. The Northern Cup would turn back into the GT4 European series, while the Southern Cup would turn into the FFSA GT Championship.

## Homologated vehicles

As of October 2024, over 40 vehicles have gone through the homologation project with the RACB. GT4 cars can either directly be built by the automotive manufacturer, or by race teams and tuning companies.
| Nr. | Manufacturer | Model | Developer | Debut | Expiration | Notes |
| RACB GT4-001 | Ford | Mustang FR500C GT4 | Multimatic Motorsports | | | |
| RACB GT4-002 | Aston Martin | V8 Vantage N24 | Aston Martin | | | |
| RACB GT4-004 | BMW | Z4 M GT4 | G & A Racing | | | |
| RACB GT4-006 | Nissan | 350Z RJN | RJN Motorsport | | | |
| RACB GT4-007 | Porsche | 911 (997) GT3 MY06 | | | | |
| RACB GT4-009 | Ginetta | G50 GT4 | Ginetta Cars | | | |
| RACB GT4-010 | Chevrolet | Corvette C6 GT4 | Callaway Cars | | | |
| RACB GT4-011 | BMW | M3 GT4 (E92) | BMW Motorsport | | | |
| RACB GT4-012 | Aston Martin | V8 Vantage GT4 | Aston Martin | 1 April 2009 | 31 December 2018 | |
| RACB GT4-013 | Maserati | GranTurismo MC | Maserati | | | |
| RACB GT4-014 | Nissan | 370Z Nismo GT4 | RJN Motorsport | | | |
| RACB GT4-015 | Lotus | Evora Cup GT4 | Lotus Cars | 25 July 2011 | 31 December 2018 | |
| RACB GT4-016 | Chevrolet | Camaro SS GT4 | Riley Technologies | | | |
| RACB GT4-017 | Porsche | 911 (997) GT3 Cup | GT3.nl | | | |
| RACB GT4-018 | Hyundai | Genesis Coupé | | | | |
| RACB GT4-019 | Ginetta | G55 GT4 | Ginetta Cars | 1 April 2014 | 31 December 2021 | |
| RACB GT4-020 | Toyota | GT86 GT4 | GPRM | | | |
| RACB GT4-021 | KTM | X-Bow GT4 | Reiter Engineering | 1 January 2015 | 31 December 2023 | |
| RACB GT4-022 | SIN | R1 GT4 | SIN | 1 January 2015 | 31 December 2019 | |
| RACB GT4-023 | Chevron | GR8 GT4 | Chevron | | | |
| RACB GT4-024 | Porsche | Cayman GT4 Clubsport | Manthey Racing | | | |
| RACB GT4-025 | BMW | Ekris M4 GT4 | Ekris Motorsport | | | |
| RACB GT4-026 | Maserati | GranTurismo MC GT4 | Maserati | 1 April 2016 | 31 December 2019 | |
| RACB GT4-027 | Ford | Mustang GT4 | Multimatic Motorsports | 1 March 2017 | 31 December 2024 | 6th Generation Mustang |
| RACB GT4-028 | Porsche | Cayman PRO4 | PROsport Performance | | | |
| RACB GT4-029 | BMW | M4 GT4 (F82) | BMW Motorsport | | | |
| RACB GT4-030 | McLaren | 570S GT4 | McLaren | 1 January 2017 | 31 December 2024 | |
| RACB GT4-031 | Chevrolet | Camaro GT4.R | Pratt & Miller | 1 March 2017 | 31 December 2024 | |
| RACB GT4-032 | Saleen | S1 | Saleen | | | |
| RACB GT4-033 | Mercedes | AMG GT4 | Mercedes-AMG | | | |
| RACB GT4-034 | Alpine | A110 GT4 | Alpine | | | Includes: A110 GT4 Evo |
| RACB GT4-035 | Panoz | Avezzano GT4 | Élan Motorsport Technologies | | | |
| RACB GT4-036 | Aston Martin | Vantage AMR GT4 | Aston Martin | | | Includes: Vantage AMR GT4 Evo |
| RACB GT4-037 | Porsche | 718 Cayman GT4 Clubsport MR | Manthey Racing | | | |
| RACB GT4-038 | Audi | R8 LMS GT4 | Audi Sport | | | Includes: R8 LMS GT4 Evo |
| RACB GT4-039 | Toyota | GR Supra GT4 | Toyota Gazoo Racing | | | Includes: GR Supa GT4 Evo GR Supra GT4 Evo2 |
| RACB GT4-041 | Ginetta | G56 GT4 | Ginetta Cars | | | Includes: G56 GT4 Evo |
| RACB GT4-042 | Porsche | 718 Cayman GT4 RS Clubsport | Porsche | | | |
| RACB GT4-044 | BMW | M4 GT4 (G82) | BMW Motorsport | | | Includes: M4 GT4 Evo |
| RACB GT4-045 | McLaren | Artura GT4 | McLaren | | | |
| RACB GT4-TBD | Nissan | Z Nismo GT4 | Nismo | | | |
| RACB GT4-TBD | Lotus | Emira GT4 | Lotus | | | |
| RACB GT4-TBD | Ford | Mustang GT4 | Multimatic Motorsports | | | 7th Generation Mustang |
| RACB GT4-XXX | Audi | TT GT4 | Jorg Van Ommen Autosprot | | | |
| RACB GT4-XXX | Mazda | Miata MX-5 GT4 | Jota Sport | | | |
| RACB GT4-XXX | Lotus | Exige GT4 | Lotus | | | |
| RACB GT4-XXX | Maserati | Trofeo Light GT4 | Scuderia Giudici | | | |
| RACB GT4-XXX | Porsche | Cayman S GT4 | GPR Racing | | | |
| RACB GT4-XXX | Bufori | BMS R1 | | | | |
| RACB GT4-XXX | Donkervoort | D8 GT4 | | | | |
| RACB GT4-XXX | Jaguar | F-Type SVR GT4 | Invictus Games Racing | | | |
| RACB GT4-XXX | Lotus | 2-Eleven GT4 Supersport | Lotus Cars | | | |
| RACB GT4-XXX | Peugeot | Spider THP | Peugeot Sport | | | |
| RACB GT4-XXX | Radical | RXC GT4 | | | |
| RACB GT4-XXX | Roding | R1 | | | | |

## Series

SRO GT4 cars have been either exclusive to or in a distinct class in each of the following series:
Bold indicates an active series that currently uses SRO GT4 cars.
* GT4 European Series
* 24H Series
* Nürburgring Langstrecken series
* British GT Championship
* ADAC GT4 Germany
* FFSA GT Championship
* GT4 America Series
* GT America Series
* Michelin Pilot Challenge
* GT World Challenge Asia
* Dutch GT4 Championship
* IMSA VP Racing SportsCar Challenge
* Australian GT Championship
* DTM Trophy
* GT4 Winter Series standalone for 2023 onwards | GT Winter Series 2019-2022
* Endurance Brasil
* Italian GT Championship
* Super Taikyu Series
* GT Cup Championship
Additionally, the following series allow SRO GT4 cars to participate alongside other competitors:
* Supercar Challenge
* Belcar
* GT Cup Open Europe
* British Endurance Championship
* Iberian Supercars