Fantastic product that made my 2010 Chevy 2500 Duramax feel like nothing was there when towing a 42 foot fifth. Significantly more stability when turning while towing and the truck doesn't sag at all at the rear. The only thing I would recommend is not to install the shim that came with the kit if you only tow occasionally. The shim makes the ride very uncomfortable if you are NOT towing. For the best towing, add the spring setup I've ever used.