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The Nelson Performance tune just makes the truck pull hard all the way through the powerband. Allen's maxed out the tune in these trucks and you get the most power out of the tune possible. Allen will retune your PCM if you make any changes to you setup up to twice a year after the first year. He'll be sure to make you happy with your tune. He does wonders with tuning and can even make transmission performance tuning changes for you if you desire. Check out the details at www.nelsonperformance.com