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Ford is pushing an update — does this break current 2.7L tunes or is it infotainment only? First time pushing an update post ZFG tune. I expect to be able to flash back but read somewhere it could lock out the tuner.

I’m running 35×12.50R17 Mickey Thompson Baja Legend MTZs on Method 703 bead-grip wheels and planning a trip out to Big Bend. Most of the trails look like packed dirt with some scattered rocks and mild crawling. I know 18 PSI is about as low as I’d ever go, but I’m curious: • What PSI are...