I sold my 2015 Ram 3500 Cummins diesel, and now I need to sell the Duramileage tuner I had just put on it 3 months before I sold the truck. This tuner is basically new, works great, and is super easy to install on all 6.7 Cummins motors 2013- present using DEF. It has 3 power levels (30/60/90hp) that you can shift to on the move. This tuner is not a race tuner, so it's not going to destroy your driveline. It was designed to increase your power and fuel economy by way of adjusting the fuel pressure and pulse width of the injectors. It does not reprogram your ECM, so it doesn't leave any trace that it was ever there. It intercepts the original injector signal and modifies it to a more optimized level, thus increasing your power and fuel economy. Another great feature is that it almost eliminates the off idle dead pedal that makes these trucks feel gutless when first taking off. This helps significantly when towing/hauling heavy loads. Everything that came with it new is there...100% guaranteed to work!! I'm willing to take a big lose on this tuner to get it into someone else's truck.... $475 (firm) buys it delivered to your door. I also have a like new K&N drop in air filter from the same truck... $50 (firm). If your interested, please call or text Joe @ 913-244-3829.