If you are asking about the anti-roll bars, it should have them front and rear from the factory, but they are way too small for that chassis. Look at the Road Master bars with urethane bushings. This will stop the bump or roll steer tendency of this chassis when the big motorhome box is added to the chassis. It also needs a shock upgrade to Bilsteins.
We had a 1999 31' Minnie Winnie on the chassis and the steering was horrible on the road. First thing to do is to load it and get it weighed to make sure you are under on the axle weights. Next stop is an independent truck alignment and suspension shop to the alignment properly set when loaded.
Once we added the beefed up anti-roll bars and shocks, it drove like a dream.
Adding a Safety Plus or Steer Safe is just a crutch to cover up the real problem and will not fix the problem.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot