The sport package is technically an "option" so its added on the the base or touring package.
Nissan currently offers the Z in these trims:
Base w/sport (cloth seats)
Touring (leather seats)
Touring w/sport (leather seats)
Nismo (cloth seats)
The base comes with the cloth seats. The touring has the leather heated seats. The Nismo has a cloth interior.
base interior:
touring interior:
