Seats come with the sliders but the mounting brackets are an option. They are an option because if you are running bucket seats with their center console, you will use the bench seat mounting bracket, and the console attaches to it. If you’re not running their center console, you will use the bucket seat mounting brackets. If you are running the VanNatta Fabrication center console, you will want to use the bucket seat mounting brackets since the console sits on the cab floor.