Is anybody aware of recommended modifications to the 6.7L which will further optimize engine performance (HP, Torque, Fuel Economy, ect?)....

 

You are not going to find too many people here on FTE with 6.7's talking about programmers. Most don't want them as the 6.7 is plenty powerful and/or they don't want Ford knowing they have them. For some reason it is a little more open on PSN about programmers so you may want to do a search before posting a question answered quite a few times. Best of luck.

 

Programmers are not a good idea on these motors as leave a "footprint" behind. Evem when you remove it, Ford will know it was there and your warranty will be voided. 400/800 is plenty for me. Pulls my 9k TT just fine and gets 12 mpg doing it.

 

Yep. If you want your warranty stay away from modifications. There is a guy that posted a thread where a service manager gave him crap about having an after market air filter after taking the truck back in to diagnose a bunch of fault codes that popped up after a re-flash. Dance at your own risk.

I like my warranty.