This product, after I installed it on my Mercedes Benz 3500 Winnebago Via Motorhome chassis, reduced body roll on ramps and freeway exits. This product has made my RV safer on the road. I made a special tool to help with the installation. The sumo springs go in the same area as the rear bumpers and are held in place in the same way. The car needs to be jacked up to allow the suspension to hang unloaded, so the right tool is needed!