Originally Posted by 370Z Purist

In general, VLSDs are only for comfort or road speed (as in oh, it's nice) purposes. It's a Torsen diff, which basically means it sucks... bad... if you really wanted to install a good diff and if you wanted to track often, you should get a Quaife clutch type, which is basically the god of diffs. It shouldn't void your entire warranty though. You may want to talk it up with your dealer.

In any case, if you just plan to use it as a daily driver, whether or not your have the differential installed will only show if you took a 90 degree turn at something like 40 mph. Then you'll feel the rear give out a bit since I think if you don't get the VLSD, it's probably just an open 2 way.