Is no longer a 15-'17 version. .. on the new one just dont worry bout the wiring up the 12v if you have a '15-'17 modelThe 12 volt source is only required on 18+ mustang GT and f150. So if you have a 17 under get the original version.
I was gonna tune when my warranty expired but then this whole darn big a/c issue hanging over the s550's scared me into buying the extended warranty..Im sure a tune is greater option but I've had a few of these throttle response devices installed and have experienced good results from both..I can say while the Pedalmax was out of the car a bit of the driving enjoyment experience was gone..especially the ease at which I could break the tires loose..no longer had to fumble with the traction knob.Tune...