I've seen some Diablo VTT's and VTTT's out there?
What were these cars and were they offered by the factory or are they aftermarket add ons?

i thing it was the toystore or anouther dealer in south florida who made those.... but i heard they were poor quality...

there are some owners on this site, im sure they know more

So they were never built by Lamborghini, it is an aftermarkert?
I believe VTT was all wheel drive turbo and VTTT was all wheel drive twin turbo.

The very few twin turbo Diablos built were done so by Greg Armstrong on behalf of Platinum Motors of SoCal, owned by the Keuylians that now have Lamborghini OC and Bev Hills. The cars, though not factory built, were listed as a factory option I believe. I do not have any hands on experience with them, and do not know about their quality.

Chad