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| 2008 to 2010 6.4L Power Stroke Diesel (Disabled) 6.4L Power Stroke Diesel equipped Super Duty. |
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I am thinking about going to 2009 F350 Super duty SRW Crew cab with 3:55 or 3:73 gears, What MPG are you guys getting with this set up and also what mpg improvement can be expected with a Gryphon. Thanks in advance , Jim
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