There you go Bradders.
Nissan 350Z 3.5 Z33 RWD 2002 To 2008, Excluding Cabrio,
Lowers Front by -17mm,
Lowers Rear by -14mm.
Spring Rate Front 6.9 (kgf/mm),
Spring Rate Rear 7.2 (kgf/mm).
I would have them but would never get over the speed humps at the end of the drive...