nice upgrade for a 3.7 jeep!
Reviewed By Steven W (Rensselaer, NY) Reviewed for a
Jeep Grand Cherokee
—10/31/2016 2:10 PM
I bought this for my 06 jeep grand cherokee with the 3.7 V6. it has a 2 in lift and bigger tires (31's, i didnt want to go too big since its my daily). i bought the programmer mainly for tire size calibration for my speedometer, but i was pleasantly surprised by the performance increase from the tunes. great power increase across the RPM range, throttle response is instant (i also have an injen cold air intake), its no race car but its a nice addition. MPG's increased also. only con is price