The need for a steering stabilizer is going to depend on how big and how heavy you go with your wheel and tire combination, and doesn't really depend on the kit itself. In general, the factory stabilizer can handle most 35" wheel and tire combinations without issues. As far as carrier bearing adjustment is concerned, according to ICON, the 2011-2016 F150s with a two-piece driveshaft do not strictly require a carrier bearing drop kit with this lift, since it's not tall enough to really warrant it. However, if you are getting driveline vibration after install, then you should give us a call at 623-434-5277, and we can get ICON's carrier bearing drop kit for you.