about adding power banks to a 2011 6.7 disiel can it handle the hourse power

It will put extra stress on the drivetrain for sure but some get away with it. A lot it has to do with how you drive the truck. If you add that kind of power and are constantly beating the hell out of it, it will eventually break. Talk to Banks and see what they say about upgrading parts of the drivetrain. I would recommend extra transmission cooling for sure. Alex

How much is enough power? Ford provides as much power as can ensure component durability. Yes, you can tune it. And you risk extremely expensive damage. Is Ford (as well as other Diesel truck makers) conservative? Perhaps a bit. But for good reason.