IIRC Kore did a custom lowering suspension for the FASS road racing 4wd truck. It's a third gen, but they're similar in design. If you don't go off-roading, you don't need the travel or articulation. Dirt roads, sand traction, snow on the road, easier access into the cab & bed... . The gain in mpg for a 2" drop should be 1-2 mpg all other things being equal (just my $0. 02!)