I was reading a thread. And you all need to make sure that the shipping spacers on the 2 front suspensions are taken out by the dealer! If not take them out yourselves or if you want have them do it. I just did mine myself because I know they will deny it or not know what im even talking about
. This may be the reason your ride is so rough! Mine had 3 on each side. Here is the link to the thread.
Nismo Z Suspension: All Nismo 370Z Owners Check Here FIRST!