The Open 4WD category allows several types of car to compete in the RallyX championship.
Supercars/RX1s complying with current regulations (with the exception of direct-injection engines and front-mounted cooling systems) are allowed to compete in the PRO and PRO AM classes.
Older-generation supercars are also accepted.
Other authorized vehicles
- FC2 (tubular chassis and turbo engine) PRO + PRO AM
- Projekt E/ERX (RX1/Supercar powered by electric powertrain) PRO + PRO AM
- ZEROID X1 (tubular chassis with electric powertrain) PRO + PRO AM
- T3F (tubular chassis powered by an atmospheric engine not exceeding 3500cc) PRO AM exclusively