i just traded my 2004 lincoln navigator for a 2011 ecoboost supercrew 4x4 6.5 trailer tow option. on my lincoln it had a full air ride. the nav sat low until you put it in 4x4 then it lifted 2to 3 inches . that is the only thing i miss about my nav. i was wondering if any one has tried to do a air bag kit at all 4 corners ? and if there would be any mpg increase in lowering the truck like this ?

 

I lowered my front 3" and in going to.bag the rear. Im guessing it.could increase mpg on highway