i would hold off on ANY exterior modifications unless it is a nice set of wheels or OEM (or a good replica company) NISMO V2 front bumper, USDM or JDM NISMO side skirts, the rear “bumper tuck” mod (with single exhaust and finned diff cover :excited ), rear wiper delete, and the OEM lip spoiler or nothing on the trunk.
that’s the only way i like modded Z’s, either that setup or stock. that’s just my opinion though 