We have a Passport 380RE 35 inch travel trailer. Because of its design, it puts a lot of stress on the hitch, which is why it feels "easy" when towing from the front. That's why we bought this airbag kit. The installation instructions were not impressive. Glad I'm a mechanic. Still the install took about 4-5 hours from start to finish (3 hours first page then finished quicker after I figured it out) the star is right there UPDATE: 15 Sep 14 Despite poor instructions the end effect is great. MUCH more stability and a lot more control when towing 40 pounds per square inch everything evens out and drivability and handling are vastly improved (that and my headlights shine where they belong!) l Line tee to eliminate a single inflation point receive. In our application, we placed the filling fitting in the area of the tank flap so that it is not directly exposed to the weather.