2 sway bars on a pull behind trailer

If your hitch head does not have a wing on the top on both sides where the little ball fits, you are going to have to get a new hitch head so you can get a friction bar on both sides. You'll also have to add the second ball mounted to the trailer frame on the opposite side. Then, you'll have to find a left sided sway bar, as everything will be turned opposite from the right side set up. By the time you purchase a new hitch head, install all the parts for the second sway bar, and re-install your hitch ball, you'll be much better off to just toss the entire system and purchase a new weight distribution system that is much simpler and does it all. Systems like the 4 point Equal-i-zer and the Reese Dual Cam systems come to mind immediately.

Now, if your hitch head already has the second wing with the hole for the ball, then adding a second friction bar should be pretty simple, but you'll still need to mount the left side ball on the trailer A-frame.

More info, click here.