WTB: Nismo catback exhaust 350z

[jonsusoju]

i have a 2006 touring 350z 6-spd and want to put on a nismo catback system.

i've heard there are differences in s-tune, non s-tune, etc. Some infromation on the differences would be nice (my first z!)

i'm set on the nismo since most sources indicate its 50 state legal (though not the only one, i'm interested in keeping this car with nissan oem parts only).

i'm fine with used. price range is below 900. please indicate condition, how many miles, etc.

thanks for all the help!

i'm located in southern california.