According to Ford, any tuner will void my warranty...

Is there anything out there that I could use to:

1. Increase Gas Mileage
2. remove the 80 mph limiter
3. Still tow like the beast that it is!

Yes, Spartan will do all of the above. You will need to remove the DPF and install a DPF delete pipe. Spartan claims that their Tuner is un-detectable- - but you will need to return the truck to stock before any major warranty work.

Check out http://www.thedieselgarage.com/forums/index.php
for more info

And how much is this set up? I found one for 1400.00 dollars. You can buy A LOT of fuel for 1400 dollars.

I run the Spartan,,plus cat/dpf delete 4" exhaust and an AFE Stage II air intake system,,,made all of the difference in the world to the truck,,,and improved fuel mileage.

Thats almost my monthly fuel bill!! Spartan is an awesome tuner but I have SCT on mine its a lil cheaper up front and they just released custom tunes so hopefully they might be able to catch up to Spartan in the HP arena!