The intake might give u warranty problems. depends on the dealer. on the NISMO website, they clearly state that their CAI will void warranty.

Federal law requires that the dealer proved that what you put on caused the problem for them to deny warranty.

your better off lifting it.

Look up ur local Xterra club. I think Virginia Xterra club, will is the closest. I'm in the west,
so I'm little help. They'll also be able to help you out on wheeling spots.
http://vaxc.org/