If you want good mileage gonna have to get rid of the DPF, I'd stick with a nice adjustable tuner like the spartan on there just in case someday he does want to get rid of the DPF then you're not stuck with a $350.00 pile of junk like you will be with the hypertech, not saying that hypertech doesn't put out a decent product but for great power and MPG i'd stick with a Ford specific brand tuner such as Spartan

plus spartan and the others can just put your rig in a transmisson mod, shuts off everything and adds no more power output to the engine great idea if you ask me

I agree with Superstroker because you wouldn't believe the differences transmission programming can make to a stock motor/truck from the factory the shifts are designed to be comfortable and smooth, which can lead to unnecessary wear and tear on the tranny and annoying searching for gears when not at all necessary

So what would be a good tuner on the cheaper side, ive seen spartan and there expensive so i know he wont go for that. What can he expect on say just a cai? Does brand make a difference on power? Thanks

SCT Livewire :U:

Great, what kind of mileage gains can he expect?

they are all expensive. you can get the livewire but still have to get those tranny tunes for it

All you have to do is get a custom tuned Livewire.

luke how much can you get me a custom spartan

You need to make sure with your dealer they are not going to give you any hassle about a CAI.

Some dealers will.

I've seen them eat turbos, as well as cause CEL's on the 6.4 trucks without a tuner on 'em. It fucks with the MAF reading and will throw a DPF efficiency code and some EGR codes if I remember rightly.