[JeepNmpg2]

I'd like to build on that and add a carrier under it, that way you can store items on the hitch behind the car, and use the kamm to continue or improve the cars aero lines to perhaps increase FE while adding additional weight (or at least counteract the additional weights reduction to FE). Of note: the weight being behind the rear bumper will cause more flexsion of the suspension (lower rear end) and cause the handling to vary according to the terrain being traversed so use it with caution. For bluff backed hatches, SUVs and vans it is probably the best option over towing a trailer if you don't have more than 200-500lbs of stuff to carry.