theres a place that makes turbo kits for Z's and there a little more inexpensive than Greddy and the other places i have found!
they just sell the pipes usually but will sell turbos and stuff 2
its with a 3 inch down pipe and alum intiercooler pipes and headers
the hot pipes are headerwrapped and painted black or any color you want
the cost shipped to you is
$1900.00