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Last year I had a relative visiting here from Minnesota also with a sticker that looked like that, he claimed that the dealer had to reprogram his truck to stay within government boundaries ( whatever that means ). Claims he lost power and mpg's. also a 6.0
I had never heard of this, that's why I asked you what state were you in.
look up power hungry performance. they sell ficm tunes and can at the same time change your ficm calibration to a different more economical program. the updates have been known to cause drops in mpg and power.
here explains some of it Power Hungry Performance - FICM Reprogramming
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.