In the transmission input side? I have ~2" of the input that goes into the rear trans seal still showing after I bolt it up. I called Z1 and they told me they make them with more slack in order to make it easier for install, and it is fine to have that much. I know I ordered the right shaft: TT 5spd manual, this is the platinum version. I've never heard of this "slack" in the Z1 shafts mentioned on here before.
Follow Ups
How much slack should the Z1 platinum driveshaft have? - Jkova300z09:38:11 10/30/13