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  1. H&S minni maxx and 4inch down pipe back exhaust

    6.4L Performance Parts Discussion
    I am looking into purchasing a H&S mini maxx tuner and 4 inch down pipe back exhaust with dpf delete. I have a few questions and am hoping to contact some people that use these mods. 1.) what type of MPG can I expect to see if I drive in a respectable manner? 2.) Has anyone had any engine or...
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