My 2011 F-150 EcoBoost w/Max Tow Pkg. has the built-in sway control. With that in mind when I bought my trail, I made a deal with the salesman for just a heavy-duty hitch insert. Then I got to thinking, "You're pulling a $XX,XXX trailer with a $XX,XXX truck. Do you really want to cheap out on the only thing connecting the two together?" I decided there was more going on back there than just sway
. There was weight distribution, in addition to that 30' wind magnet of a box I was going to be towing. That's when I called him back and had him upgrade me to the proper WD hitch with sway control - the one he'd install on his own vehicle. He set me up with a Husky w/single sway bar. I'm glad he did! In fact, even with the integrated sway control and
the single friction sway bar, I was still getting quite a bit of sway in windy conditions. At the recommendation of JOF's own "Rustic Eagle", I added a second (left side) sway control. It was like a night and day difference! Now I'm perfectly relaxed and comfortable towing even in 25-30 mph side gusts. (I'll admit that I don't care much for 30+ mph winds, though.)
I'd highly recommend getting a good weight distributing hitch with sway control . . . even with the truck's built-in sway control. You won't regret it!