Does your Xterra have the proper rocker panel protection?
If not be sure to check out
http://white-knuckleoffroad.com/nissanxterra.htmJohn with White knuckle is a great person to deal with and the service is quick.. Most people wait less than 3 weeks to delivery. This is un heard of in the aftermarket world.
Be sure to tell them you tell them the crew of the nXm says hi