We are talking about two different things here.
CV=Constant Velocity joint, and a double cardan joint. They both transmit power at greater angles than u-joints, but they are different.
Blue_71 is right about cv joints on drive axles. Check this out
http://images.google.com/imgres?imgu...UTF-8%26sa%3DG . (Sorry, I don't know how to post the link with only a word or two).
My K20 has a double cardan joint between the t-case and front driveshaft. It resembles 2 u-joints as an assembly, as shown here
http://images.google.com/imgres?imgu...UTF-8%26sa%3DG
Hope this helps...
