I agree, but I disagree with the ruling. I understand the ruling, just don't agree with it.This is not correct. If you have an R your option is to replace the Haldax(?) With something else...which I'm not sure if that's possible. You can add a diff to an AWD car if it doesn't have any OEM diff. That is not the case for the R as I understand. This has been protested and ruled on so I'm pretty confident.
Better idea is just send the AWD cars to STU or STX.