I was just after a bit more sound from the exhaust too. I don't need a performance gain just yet.
I had looked at the Takeda axleback/muffler delete.
I saw some others on FB just had them made locally.
So I got my local exhaust shop to knock some up. They came out beautifully. Add a good amount...
Seeing as though most people have not had this issue on the Z yet, you may have sub par springs.
It would be worth finding out. But I can only imagine they would just replace them with other OEM parts. A replacement might be better than what you have, I don't think it could be worse.
meh works fine for me
I could see a problem, where the car in front is rolling back and you push in the clutch to roll back also and give them some room. But nothing happens right away.
When I took mine in for the 1000k check up, the people on the desk has no idea. But they made a note and the service guys did it (Bartons Wynnum) no charge.
I believe Nissan Consult 3 or 4 is the software you need. Need proprietary connector too i think
https://www.nissan-techinfo.com/Home.aspx
Short answer: you can't
Long answer:
It might be possible via a dealer with the Consult 3 (or newer) software.
This is an option for the 370z that is disabled in our market, along with the windows up/down via the key fob. It is outlined in detail how to set it in the 370z repair manual...