Mine came from the factory with one, on the SRW Fords it's included with the camper package. I imagine with a slide-in on a SRW everything to help combat sway would help.
A friend of mine bought a new '95 CTD dodge dually and put a 11' lance on it. That truck came without sway bars or overload springs stock. Following it was like watching a drunken sailor, it swayed all over the place.
Yep , got one and it came from the factory . I am very pleased with how mine tows with the over loads and the rear sway bar. Tom
My Chevy does not have one, but I want to add one as I understand that it makes things more stable when towing heavy.
