Understeer on stock nismo?

Nithmo

I've heard getting a beefier front sway bar will cure the understeer. Apparently the rear sway bar is fine as-is, but the front could use some beefing up. Two options- Eibach or Hotchkiss. The hotchkiss is said to be "more extreme", but in my experience, ride wise, nothing changes with a sway bar, besides how planted the car stays when cornering. The eibach is a more mild upgrade, though a noticeable one still.

Given the options, I'd suggest going with the front hotchkiss sway bar, and calling it a day.