Looks like you folks out in the mid to Eastern US do things a lot different than the west. Quite honestly, from the forums it sounds like you guys know more about this stuff then anyone I talk to out here. I have an 03 7.3ltr, It's straight piped, 3". I run edge evoulution chip right now. Will probably sell it with my 97 7.3 liter for incentive to complete the sale. I want to upgrade. Been looking at the juice with att because of the in cab monitor. That would keep me from doing gauges. Also, like the fact that I could run at milage setting until I pull up to a stop light with a cummins and or duramax. With the push of a button, up the chip to extreme. I don't like how loud my truck is with no muf. What would you do for mostly milage, and not too noisy?:bow: Money is a concern, but will have some cash when I sell the 97.