Some 7.3L MPG items...
-S&B Air Intake
-PHP Tuning
-CFM+ Intake Manifold System
-ATS Sub Zero Intercooler System
-Turbo Compressor Wheel
-MBRP Single Exit 4" Exhaust
-Water/Meth Injection

It is really going to come down to how you use the truck and what your budget is. If you would like prices on any of the above items, let me know.

Thanks,
Kenny
352-636-0812