Ok so the nismo suspension is non-adjustable I was wondering if anyone with a nismo Z has used lowering springs instead of coilovers. Looking to lower my Z about 1-1.5 inches

 

You should have the S-Tune suspension which i 'm sure are lower than standard, just have a look under the car and if the dampers are red then they're S-Tune. If you're not happy and just want springs you couldn't do any worse than looking at Tein, I think these have a 25 to 30mm drop which will suit you fine.