The NISMO Z, despite having 350 HP, is not super crazy fast compared to the standard 370Z. The extra weight from the add-ons pretty much negates the extra power.
I'd like to see what the NISMO Z really puts down so we'll know what sort of "tuning" was involved.
As for CBE upgrade, IMO, the Z hauls a bit harder and becomes lively around 500 RPM sooner.
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