So I want to do the whole 350z/coupe springs setup on my 03 sport sedan. Before I order my parts, can someone tell me if it matters what year z/coupe the springs come out of? Also, if it needs to be revised/unrevised?

 

Yes, I just installed the full 350z suspension. I love it.
It must be the "revised" suspension. The revised suspension, was introduced by Nissan in 2005 for the 350z. So if the springs you buy are from a 350z older than 2005, they are unrevised. The unrevised springs will cause your car to bounce around on the highway, or "porpoise". See my thread
https://g35driver.com/forums/brakes-...uspension.html

 

Cool, now what should I know about the coupe springs?

 

You will need to do some reading on your own! I know nothing about the coupe setup, but it has been discussed at length..........

https://g35driver.com/forums/brakes-...nsion-pix.html

 

The OP only mentioned he was changing springs. The bouncing problem is with unrevised 350z struts/shocks; the springs have nothing to do with it. 350z front springs were the same every year.

When you get your springs, check the colored dots to make sure they are what you were expecting. The first time I bought springs from someone in the marketplace, I received a box of four springs from three different cars! The info for all the different colored dots can be found in the middle of this thread:

https://g35driver.com/forums/brakes-...nsion-pix.html

 

sweet. thanks guys!