What was done to your JK this week?
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But it will correct your speedo and you can tune it for different octane fuel to really get your Jeep moving.
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Are we talking about better response from the engine or gas economy? I'm new to those things so I'm a bit confuse about the differences of with and without it...
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Example, before the tune my cruise control would drop 5 miles before the auto tranny kicked in to bring it back to speed. Same place, same speed with the tune and the engine was able to maintain speed without dropping, then gunning it back to the set speed.
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I know once you get up a bit in tire size 33 and up the automatics have an issue with overdrive unless you use a programmer to adjust for tire size. I have the super chip for mine because I am going to swap the gears and I already went up to 35. There are other chips that will adjust the tire size for a lot less but the super chip has a lot of extras. It's good if you're planning on doin a lot of other mods.