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Old 08-09-2017, 07:10 AM   #3
Hacksaw
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Join Date: Sep 2016
Posts: 409
Default Re: low fuel mileage

I have a Bully Dog. Tried 3 different modes and either one seemed to effect mileage only perf. Recently fried the auto trans and since the rebuild I have not used the tuner. It's got 4" exhaust.
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