I haven't read the whole thread but I saw someone suggesting getting a programmer, the Superchip ones and some others will not void your warranty; and they do have significant power gains and some mileage.
The only problem is it could cause you some trouble long term, I have a new buddies with programers, propane injection, ect on their diesels. They have had numerous head gasket issues, tranny issues ect. It might just be a fluke but I would look into it, my buddy just had a headgasket done on a 2007 Ford Turbo Diesel and it was a $4500 bill because they basically had to removed the motor to do it.
Nice truck though, shit I bet it has plenty of power as it is, just get a coffee can muffler and be done with it.
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