FYI .. GSedan35 tested my OEM 05 ' x springs ... Rates are F/R .. 283/355

So for sedans ....

Sedan
2003 - 2006 - G35 sedan sport suspension spring rates - 314/342
2003 - 2006 - G35 sedan non sport spring rates - 283/308
2004 - 2006 - G35x spring rates - 283/355

... as you can see the X has stiffer rear springs than any RWD sedan, but, same front rate as non sport RWD Sedan.

this should get stickied...

I will put this under the 350z suspension thread..post # 30

Thanks for the info!!!

what does this mean about aftermarket springs?

This means that we can lower our X easier. Just check the other companies spring rates. Thanks for the info bro.

so this mean that the front shocks will accept after market springs quite well no?

Some one with more knowledge on the subject may want to chime in,
But, from what I understand, the following would be a good approach:

Front : Any front springs that work on a NON-sport RWD Sedan should work perfect on the X (since both have same OEM spring rate)

Rear: Any Rear springs that work on a SPORT RWD Sedan should work perfect on the X (since both have VERY CLOSE OEM spring rate)

How do spring rates compare to the revised & unrevised 350z springs?

well, the unrevised ones are closer to spec!!

2004 - 2006 - G35x spring rates - 283/355

03/04 oem Z spring rates 314/342
04.5 to 06 oem Z spring rates 314/427


does this mean that it is better to go with the unrevised versions?

[QUOTE=Neal376]well, the unrevised ones are closer to spec!!

2004 - 2006 - G35x spring rates - 283/355

03/04 oem Z spring rates 314/342
04.5 to 06 oem Z spring rates 314/427

QUOTE]

sorry for little off topic from the X-spring rate.

So for the RWD sport suspension sedan, from what you're saying, it is better to have the unrevised Z springs because the revised would be too stiff and maybe bouncy. Is it correct?