On my 2500 Ram with my 28' enclosed trailer I now use both the weight distribution bars & sway control. Does it need it, no. It still pulls fine without them but yes, it does pull even nicer using them both. Not sure how much better the sway control helps but since I have it all I use it. No issues, better safe than sorry.
Ditto here. I've pulled my 24' enclosed at 8000 lbs with both sway and no-sway on my 01 Ram 2500 and my '15 Ram 2500 4x4. Noticeable difference on the 01, subtle difference on '15, which weighs 1600 lbs more than the '01. Both are Cummins. I'd say go for it, its only a few bucks more.
