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I have a 99 250 SD just purchased a Superchips tuner, have wanted one for a long time but afraid of messing up something trans or rearend. Can someone tell me are these tuners bad ideas or not I don't dog my truck wanted mpg boost and the feel of more pickup and acceleration. Any opinions would be appreciated.
 

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superchip flashpaq tuner

is what i got with the truck i just purchased . theres 5 different tunes i can run with , and the thing is set up so u cant harm ur vehicle , from the mfg. of the devise . i went online to check it out first , before i used it . if its anything like this 1 , ul find something there that you will like . they even offer updated tunes you can down load , with the brand i have . im already looking into better performance upgrades , to compliment the system . enough is never enough .
 
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