While these Add-a-Leafs add load capacity and definitely help you manage heavy loads and towing, you still cannot violate your truck's GVWR or GCWR due to legal and liability reasons if you get into an accident. More goes into a GVWR/GCWR calculation than just the truck's suspension, including the max load on the wheels and tires and how much load the brakes can handle. Unfortunately, that sticker on the door is pretty immutable in the eyes of both the law and insurance companies. Your better bet would be to look at a 5th wheel with less tongue weight.