I haven't seen a JET chip that is made for our trucks. In any event, I have never seen much of an improvement with them, either on my own vehicles or others.
You want to wake up that HEMI? Get a CAI, freer flowing exhaust and a programmer, such as the DiabloSport Predator or a SuperChips tuner. I have the DSP on both of my MOPARs and really saw an improvement. If ya want a representative demonstration, check out my Ram Mods link below and go to page 2 where you will see my before programmer install and after programmer install dyno results. At the time, I had a K&N drop-in filter in the stock airbox and the exhaust had been done.