i had the same problem the OP had.....exact same one. ran the RE-11's for 800mi. and the car never felt fine. i would be on the freeway with my rear going everywhere. thought it was alignment and had it checked out and nothing....guys thought i was smoking till they drove it. went ahead and bought some hankooks all around and problem was solved.
didn't read through all the pages but this post shows why this guy thinks he knows all 370Z....
Which struts will adjust back to stock ride height??!!!
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work for nissan, so baciscally i can do an alignment everyday if i want lol."