Are rear Stb just as important as front? Do they offer anything for a 2007?

 

short answer: no.
long answer: no, no, no.

front stb's aren't very important either, in truth. They're primarily for looks, and provide only minimul structural rigidity on only in the hardest of cornering. I've run autocrosses with mine taken off an noticed little to no difference at all.

but they do look nice under the hood, that's for sure.

moving to 6th gen forum where someone can tell you what's available for your 2007.

 

we have shox in the rear. struts only in the front.

now there are many options to upgrade the rsb. (though haven't heard if one's available for 07)
look through the STICKY:

http://forums.maxima.org/showthread.php?t=413817