Just as a heads up for anyone who has not pulled the trigger on buying the roof rack for their Model S, I had to call the manufacturer of the Whispbar today to get a missing part, and they informed me Whispbar was discontinued and manufacturing halted a month ago. They could not find me the missing bolt from the kit I just purchased because it was already all out of stock at the factory. I'm not sure what my options are now. So...if you have not bought the roof rack yet, I'd suggest doing so soon. Yakima, who owns Whispbar, said they do not have a compatible product on the horizon for the Model S, so there may not be any options for a roof rack soon.