Jet chip
I had the Jet chip on my old CJ and was not happy with it, I had it replaced twice. Jeep wouldn't start. Customer service was awesome but I did not notice any improvement in milage or HP. I have used other "Chip/programmers" with good luck. I had the Edge kit on my TJ and was very happy, also the little MAP adjuster for my other TJ worked well for minimal $$. For my 2012 I am going to look at one of the new tuners like the one noted above.



