I stumped Dr. Z with this one. You can "Ask Dr. Z" on the Dodge website. They wrote back saying the question was being investigated. The next day I got another reply saying they had forwarded it to another department, and although it will take longer, it would be worth it to get an accurate reply. That was three days ago, no reply yet.
Well, here is the answer. Sure is a lot of stuff for free!
Thanks for for your recent inquiry.
The Dealer Installed Dark Group for the 2007 Dodge Nitro Nitro
black tube steps, rear splash guard, two rear air deflectors. For
additional information regarding the availability of this Mopar
please your local Dodge dealership.