If it hasn't been commented on enough, CF driveshafts are for RWD cars. second of all how some of you have posted that the torsional stress would rip it to shreds... um, YEAH, if you're putting 700+ HP. The CF driveshafts through ACPT (www.acpt.com) hold up to some 800 lbs torque. powertrainindustries.com makes a one piece aluminum driveshaft. The Z's driveshaft is about 26lbs and going w/ a CF one drops the weight to about 13 lbs. the 1 piece aluminum one through powertrain ind. is 12 lbs to my knowledge.
Um, why have this discussion???

 

[french accent]But of courseeeee[/french accent]