6 classes- RWD, FWD, 4x4, and for each, 2 engine classes- Sub 2.6 and over 2.6 (no point being more engine classes than that as with this amount of power and turbos make capacity less relavent)

Main reason to have the split at 2.6 is to keep the GTRs and Supras from totaly Pasting the Cossies

That leaves the GTSTs (2.5) and the Scoobs/EVOs etc to contend with cossies (many of them being 2.2-2.5 stroker conversions).

And overall winner of each event (ie 1/4, handling, top speed) and outright winner, obviously.