G's right on.
The mod has to be PROVEN to cause the failure of a covered part...
If you replace the shocks, and one breaks, OK, it wasn't covered by Nissan...but other than stuff like that, X mods are pretty bullet proof compared to some...and hey, you could always put the factory part you removed back on, like the warrenty would do anyway.
So - Lift away!

_________________________
- TJ
2001 Xterra '03 VG33, SE 5 spd, 305/70/16's, Revolvers, UBSkidderz, Doubled AAL's, 3"SL/2"BL, winch/bumpers, skids, sliders, OBA, Snorkel, pine stripes....
Friends don't let friends drive stock.
http://www.gifsoup.com/view/501230/tj-tackling-crawlers-ridge-o.gif