i am going to take a picture of my rails and post it. they're not really rails with tracks or anything. they just appear to be rails bolted onto the roof with no place to attach anything else. in fact, you will see that there is already some cheapy aftermarket rack installed (to be removed) on the inside of these rails but which is too flimsy to serve any practical purpose. i went somewhere that sells thule and yakima and they couldn't figure out how to mount any towers to these factory rails. so i'll post the photo and please forgive our ignorance in advance if there is something obvious we are looking over.