Z1 is a generic Helical Geared Diff much like the Quaife but without the name brand or reputation, assuming a re-branded Kaaz or Tomei given the pricing. Wavetec is a much better type of geared differential for really not much more, I would have gotten it if I had known about it. The real question you should be asking is geared (Wavetech) or clutch type? Which, for me, is basically are you willing and able to adjust and tune your clutch diff setup based on your performance needs or do you want a pretty good one size fits all no maintenance diff?
Last edited by 2011 Nismo#91; 03-17-2020 at 07:28 AM.
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