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I would like to ask this question, If you were on the fence on purchasing a Spartan tuner would you just go ahead & just do it?? Also I don't want to loose the DPF & 85% of my towing is in the mountains of Colorado. I tow around 17,000LBS.
Stymie, sounds like you still have the DPF on & getting an impressive 3-4 mpg gain, not bad, which tune do you leave it in?? Have you towed with it yet & if so what are you numbers??
Thanks in advance for the responses.
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