Can the stock Bilsteins on a new xterra off-road support a 2 inch suspension lift or do I need to change them as well? The dealers don't seem to know or just won't say.

If you're doing a Calmini or Daystar Spacer/Shackle lift, the short answer is yes, you do not have to change shocks, however to get full droop in the rear, you'll have to get some longer shocks.

Search, as this has been covered a dozen times.

Thank you for the response and info.
Since I'm new to all this, I'm not familiar with a lot of the terminology. Bear with me here. By "full droop", I take this to mean the full extension potential of the rear. Yes?