That car doesn't need a tune... just test it out and try it, don't just presume it needs a tune for it to be able to drift...
Damn it drifts like a beast, but is there any tune to make it extreamly beastial?
The RUF RR cars drift quite well on their own. I've got one that I use that drifts very clean with no mods IIRC.
All I did for mine was turn all aids off and put comforts on it.
Think he has enough power in that thing.