Group G4 will initially be eligible for the Australian Rally Championship only. The intent of the G4 is to enable competitors to transfer the drivetrain and mechanicals from a donor 4WD production car into a different modern bodyshell - for example a Ford Fiesta or Mitsubishi Mirage with Mitsubishi Evolution X components consisting of the engine and drivetrain.
Group G4 will result in competition cars that are conceptually similar to the existing Group N(P) regulations which permitted cars to be built to match the performance of similar Group N cars at that time. The Toyota Corolla N(P) being one which was developed under these regulations.
The underlying philosophy of G4 will be that the cars need to comply with the PRC regulations except where these are inconsistent with the fitment of the donor components to a different bodyshell. If it is not allowed in PRC, then it will not be allowed in G4. In keeping with this philosophy any car constructed in accordance with these regulations should be equivalent to PRC and will be required to fit a turbo restrictor compliant with the PRC regulations.
There are engineering challenges due to the significant level of modification involved in building a G4 car. In order to maintain robust construction standards and to ensure compliance with the regulations CAMS will be closely involved in the construction approval process and will require prospective constructors to lodge their plans for approval, resulting in documented recognition of each G4 car. All individual bodyshells will be recorded and managed through a process consistent with FIA Homologation.
The Group G4 regulations have now been published on the CAMS Website and can be viewed online HERE