Originally Posted by Ape Factory

They're just dialing out the inherent understeer by increasing the rear spring rate at the cost of ride quality. You can change the sway bar diameter but any increase is just tying both halves the the suspension together even more so than the stock setup. And the Z has a massively staggered tire setup too which doesn't help in that department. I ended up with a square setup on my G and it made a very noticeable difference in the car's neutrality.

I use a 12f/10r setup and I'd consider going down 1-2K in the rear but then I'd bring the understeer back. On decent roads, it's a brilliant setup with body roll virtually eliminated. It'll get a little firm out back while on really nasty roads but the fronts always seem to work really well. I've been driving round Southern California for the past few days and they'd be borderline acceptable. Had no idea Cali had such poor roads.

If the rear sport shocks don't do it for you, and you're willing to wait a few weeks, order a set of the Aragostas. No real downside and they're the only kit that can keep you at stock ride height (even above) and they have superior response/damping compared to the Nismo shocks.

Another option is to go with Infiniti IPL shocks. Same as the Nismo shocks with slightly different valving. I found they did not have enough low speed compression damping but the ride was super comfy and otherwise spot-on in the handling dept. No crashing or otherwise out of control body movement (and on a heavier car).