IIRC the Volvo in the SPEED World Challenge GT series is a 4WD car; it ran away from the field this past weekend in the piss-pouring ran, too. The SPEED GT series is about on par with the GTRs in LFS too I believe. Just because it's rare doesn't mean unrealistic It's up to the sanctioning body to determine the rules set for a series. (In this case, the LFS devs are the sanctioning body, so what they say goes )