4???

http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=70;t=000045
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=70;t=000061
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=70;t=000067
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=70;t=000124
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=70;t=000222
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=70;t=000289
And that's just here in the Performance section. In parts/accessories we find:
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=4;t=003008
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=4;t=001812
http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=4;t=001354

Suffice to say, SLR and (as yet unconfirmed) Nismo are the only header offerings so far.

Brent