Del does not follow his own advice, AKA Cummins Whale

I had a ‘02 before I bought my ‘15. The best thing to do is to add a fuel pressure and exhaust temperature gauge to it along with a fuel pump upgrade (unless the pump has already been upgraded). Then add a simple TST programmer and J-hook to the waistgate and it will have the power of the 07 trucks. The TST programmer that I had was under the hood and had 3 positions that you set manually.