Yes.
An actual Group S prototype.
750hp and weighs less than a tonne, which means insane acceleration plus exceptional handling (around or more than 20 ingame). Only reason it wouldn’t be in class X would be its very low top speed (around 250kmh), limiting its use to short tracks with no long straights. If you try using this in Derby outside the evasion-based modes then you made a dumb decision.
In CC2 it would go as Audos Qubit Proto 002, priced at 800-900B and most likely a limited as well.