Did exactly as it said it would
With having larger after market tires on the truck and checking my speed with my GPS, I was moving 4 MPH slower than my speedometer was reading. After a couple of programming attempts to dial in my tire size so my speedometer would match my GPS. I am very happy with the results. Now my truck runs a lot better, transmission shifts better, and PMG improved.
DodgeRam 1500- Centerville Ohio
I had my doubts about this Tuner but I was wrong. I have had this about 3 weeks now and initially I could tell the quicker take off. Then I went on a Easter trip to Missouri (500)only this time I was getting 20-22mpg/ 16-17 @75mph and I still had kick. To Missouri and back I averaged 20-21 mpg and was happy and the power continues to improve. Now that I have installed a K&N filter I think things will even get better. I would definitely buy this product again.