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I am thinking about a new motorhome, one that I am pondering is a Gulfstream which has the new MaxxforceDT 7 engine, which is the 6.4. Now my questions are, what are the differences? Are there any upgrades available for that engine as in programmers etc?
 

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Haters Gonna Hate
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its the navistar version of the 6.4 powerstroke, so it has diff tuning, the programming may be able to be modified with custom tuning i would imagine
 

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I have a2011 Serrano with the 6.4 max force 7 in it I have been trying to get a tune for it but no luck I tried the diesel tunes box they make for the 6.4 powerstroke but did not work eaven though I was assured it would by their tech poeple . sure would like to get a little more out of this thing but having no luck
 

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new update on my 2011 serrano motorhome with 6.4 maxx force 7 ... about 40 k milies on it and is working great . get 10 mpg towing my 10k lbs trailer behind it and about 14 mpg when empty . This is all stock still cant find anybody to program this thing .
 
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