Enkei RPF1's finally got put on. I'm on lowering springs but I can't remember what the exact amount I'm lowered by is.
18's fit just fine on a 370z, you just need to lower the car the right amount and pick decently meaty tires.
If needed I'll take/post better photos when I get the chance, I only now realize I didn't get any direct side-shot pics, oops!
Front: 9.5x18 et15 on 255/40r18 Pilot Sport 4s
Rear: 10.5x18 et15 on 285/35r18 Pilot Sport 4s