I have owned my stock 2008 H3 for about a year now, but I did not get the adventure package. I have taken it off roading in the El Paso area many times where it performs fine, but I want to start turning it into my own rig. I am going to get a K&N air intake, BFgoodrich T/A KO's, and a cat-back but I don't know enough to add much else. Is there a company that makes after market locking differentials for hummer?

 

ARB does. You can purchase the rear locker form the dealer.

 

Thanks a lot Oruna1! I know it was a noob question, but hey I have to start somewhere.