A company called Calmini is offering a LSD for a R200 diff. I've been told that it's a modified lsd from a 300Z (not sure of the year). They offer it for $449.95. But like I said, don't know if it would work but seems like a good enough price to look into.

Here it is...

are you putting this on your xterra? they have a posi diff for the xterra that would just drop in. the pumpkin on yours just drops out through the front and you could through in one from a posi unit.

I was considering this but I was worried about how it would drive in the snow. I live in NH and would rather have a selectable diff to go from open to locked in the front for better "drivability" like I have in the rear. I will most likely go with an ARB air locker in the front.

Here's a picture of the ARB kit...



I was just posting the LSD for reference and price comparison. Seeing that it was a Nissan factory LSD, the price looked pretty good to me.