Exhaust, Program, Cold Air Intake??
 

Hi everyone, I have fixed all the issues i had on my truck and its time to put the fun stuff on now, but again im new to this so I need suggestions and help. I would like to get better fuel mileage on my 2000 Ford Excursion 7.3l and from what im told I need to get a cold air intake, new exhaust, and a programmer/tuner whatever...so heres my questions (1.) How hard is it to do all this myself? (2.) What brands of what should I get ~im not rich so please attempt affordable, but not shitty, id rather save to get a little better if need be~ (3.) What all is important to do together, I know I can just do an intake for now and that helps some, but do I have to do exhaust to program it etc?? Any other help would be wonderful :) Thanks y'all