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Feb 15, 2013
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rathmann was last seen:
Feb 15, 2013
    1. silverhobey
      hi....our 4.8 is a 2010.....and mileage combined would be around 21 or so combined as we
      do 60-70 % city driving. I would think the gearing in our 2010 would be different than that
      of an 06', thus resulting in a little better modifications yet....want to do Cold Air
      Intake and am thinking of trying a Throttle Body Spacer(unsure) just to see more horses when
      I want them and to see if you can really get 5-10% better mileage with Cold Air Intake..
      take care........Brian...have a swell afternoon
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