I'm posting for my dad since he doesn't own a computer. He recently bought a 2003 F250 with a 6.0 turbo and he is interested in doing some mods. He is a 65 year old man and not interested in high performance. He does pull a travel trailer quite often and is mostly interested in maximizing fuel economy. I am trying to do some research for him and stumbled on this site. So far I am leaning towards the Superchips Cortex flash programmer and MBRP 4" stainless Turbo back exhaust system. I plan to retain the stock cat. Any input on this setup will be greatly appreciated!

Again, my dad is just an everyday driver and frequent travel trailer puller!

Thanks!