I just got my tunes from Spartan today along with my cat/dpf delte pipe from sean and my s and b intake. I installed everything along with my mbrp dual exhaust and man dose it pour smoke. I loaded the 250rwhp race tune and it just will not stop smoking. My truck fogged out a 3 lane highway to the point where u could bearly see. I am happy I stuck it out the whole time waiting for this chip because it was definetly worth it. I raced my uncle who has the sct with the race calibration for the dpf delete and absolutly smoked him. Everyone who waited will be happy with the chip.