Change out your shocks/struts at the same time then yes, but id go with revised springs and front springs should be from a Z. It will even out the wheel gap. That's what im currently running, its great!

 

ya i know revised are better, and are Z supposed to be better than coupe in the front?

 

They just even out the wheel gap. So your not riding higher in the front.

 

i am in the market for some z springs.

 

Got my coupe rear and revised z springs front off of my350z in less than a week. I have sport model so unrevised or revised worked in the front. Coupe in the rear so spring rates remained the same. Looks good rides exactly the same.

Depending on which model you have will determine what setup you need. Here is a list of springrates. Its all in the suspension FAQ. Read till your eyes bleed.

350z
2003 - 2004 - 350Z oem spring rates - 314/342
2004.5 - 2006 - 350Z oem spring rates - 314/427 (revised)

Coupe
2003 - 2004 - G35 coupe with oem 17's or 18's spring rates - 314/342
2005 - 2006 - G35 coupe with oem 19's - 314/427

Sedan
2003 -2006 - G35 sedan AT and MT with sport suspension spring rates - 314/342
2003 - 2006 - G35 sedan non sport spring rates - 283/308

Sedan X
2004 - 2006 - G35x - 283/355