i dunno.. my Scion tC ran faster than that *shrugs* sounds like some decent times for those mods though... you lost some torque with the exhaust and prolly a little with the Megan headers.... did you ever run the car stock? you can go to the evil site and check out their times.. where were you shifting at in your RPM's or did you have the auto doing all the work? key us in on a little more info please if you could.
That was a great 5 years with the Z. Moved on to better mpg and regular unleaded.