Thanks for the feedback Alex. Did a lot of online research as well as talking with a couple buddies who have or have had Super Duty's in the past. Went with a Quadzilla XZT +. Looking mostly for a mileage boost as apposed to HP and Torque increases. I'm hoping for a common middle ground with the Quadzilla. Wasn't looking to drop $500.00 to $1,000.00 either. So we'll see what it does for my 6L. I'll post results when I have them.