Today we're going to review an install, the Top Line fold down truck bed extender, part number BX4004-02. Black in color. This application is also available in silver, part number BX4004-01. Let's go ahead and take a look at the top line tailgate extender that's all ready been installed. Simply open up the tailgate, we'll pick the extender up and swing the arm out and lock it in place. The arm is… see more >