Information that I found on the V6 2006 Highlander: http://www.conceptcarz.com/vehicle/z10424/Toyota-Highlander.aspx includes towing info. It looked to me like the towing capacity is 3,500lbs and others are trying to tow with even less ability in the thread and everyone is trying to keep the price down or so I thought. Many options in the stick-built like Jayco. Of the stick-built, I believe Jayco does the best job and we have had two of them. Molded fiberglass is nice but too small and expensive for most people.