[bobcowan]

I think a car like this without some kind of limited slip is silly. Gotta have it. They're so light, and any amount of power can easily beak the tires free. Esepcially if traction is a little bit limited.

Clutch types work pretty well, but can sometimes cause a push on corner exit. On the street that's not a big issue.

If I was going to be racing, I'd order the standard diff and save the $2,100. Then swap it out for a worm gear, like TruTrak or Torsen. About the same money, but more geared towards racing.