4.08 gears

Quicksilvers

I myself would not install 4.08 gears unless you go to the track a lot or your 370z is more of a weekend warrior. I would not install 4.08 gears if you 370z is any kind of a daily driver. Your mpg will suffer with 4.08 gears. In your case I would keep the 3.92 gears that came stock in your 370z Nismo.

Felix 808

I see you have the manual, if you in fact have the 3.92 gears, I would not change a thing as 4% increase is not going to be worth it. If you are going to change gears (unless you are really fine tuning $$$$$) don't waste your time with anything less than a 10% change, you will not be happy. On the other side of that coin, you can go too far/ deep in your gearing. I would not go over 20% unless it's built for wheeling or the drag strip.

$.02 YMMV

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