If you paint the bezels, I'd recommend plastidip. Dipyourcar.com has many color options and you can always peel it off later or change colors easily if you like. Also, don't need to worry about type of paint on plastic or scuffing/priming either.
21B10 is a flash to the computers that will "potentially" prevent you from getting the cam phaser rattle that the 3.5's are notorious for. I believe it increases oil flow at startup to reduce wear. If the 3.5 is already displaying CP rattle, that FSA will do nothing, HOWEVER, once you have...
This. Pretty well documented potential issue on the F-150 forums. Wastegate can stick open/closed if you make frequent short drives and never give moisture a chance to "cook" out. By either having regular long drives and/or ensuring the turbos get some regular spin ups, cycling wastegates and...
It really depends on what you want from your dressing product.
If you want Super high gloss and aren't worried about tires browning or silicone slinging all over your painted surface, then use any of those silicone based products mentioned prior. They'll all perform similarly. Personally...