tuning for 07 cummins

04 hotrod

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Apr 18, 2010
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i have a friend who just bought a 07 cummins and he wants to tune it without pulling out all the emissions stuff. he is pulling about 7000 lbs. what is my #1 tunning choise?
 
what one would give the most rwhp and torque? and what one is safest for towing? or are they both comparable?
 
huge horsepower gains with DPF intact is kind of silly

i'd get a smarty or H&S that way when he grows out of the "i need a warranty" stage, he has room to grow
 
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