I have the 4 point equal-i-zer on my tongue heavy toy hauler. Wouldn't tow without it.
Far superior to the Reese I had before.

mooseman

 

I have an Equal-i-zer and recommend it highly. They have an informative website and it does as advertised. I bought mine from the dealer when I bought my trailer. They installed it and set it up but I redid the whole thing after a couple of trips. I was towing with a Grand Cherokee when I bought my trailer and, inspite of the super short wheelbase, I had no sway problems at all. Wyoming crosswinds, semi's passing didn't bother me at all. The reason I traded the Jeep for the CTD was power. In Colorado you are often at 10-11,000 ft. and a small block gasser really runs out of steam! The CTD solves all that. The Equal-i-zer is pretty easy to set up with regular hand tools. You do need an 1 1/8' socket. The important part of the set up is getting equal or as close to it as possible compression front and rear. Measure the fender well height front and rear empty and with the trailer on and bars in place. The drop in the front and rear should be within an inch of being the same amount. This was critical on my Jeep because I was close to my GAWR's. On the truck it isn't as important but if it's set up right, you will get the best handling. The Equal-i-zer can be noisy when turning at slow speeds. Lubing the friction points quiets it down quite a bit and does not affect the sway control. The manufacturer recommends lubing the friction points. My tongue weight is about 700 loaded and I use the 1000 lb. bars. I would think you would want the 1200lb bars with the 12,000 lb. hitch. I called the factory when I bought mine and they said not to get bars rated for less than your tongue weight. You can crank the heavier bars off but you can't make the lighter ones stronger.