I have a 4012 Inferno and couldn't be happier. I pull it with a 2012 Denali crew cab dually Duramax. Quality in the KZ is excellent and their warrenty is first class and customer service as well. I had a problem with a tire at almost 2 years and they replaced all 7 tires, spare included, no questions asked. They also paid a local body shop to replace a panel that was damaged when the tire blew. You can't beat that kind of customer service! Fit and finish are great, and quality of materials as well. KZ has a loyal fan in Me. I think you would have have a hard time finding better products and warrenty than thiers.