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  1. S

    7.3 mileage and increases

    what kind of mileage are you guys getting with your 7.3's and what kind of mods do you got. just got a late 99 350 crew cab long bed. looking at intake and exhaust just for starters
  2. S

    6.7 mileage

    my uncle has an 08 2500 with a 6.7L in it, and only gets around 13mpg. he'd disappointed since my buddies and i can get 22 with 5.9's what would u recommend for him to get the mileage he wants?
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