What's the difference between a nerf bar and a running board? Should I get a hard-folding tonneau cover or a retractable model? Why should I spend extra money on a reusable air filter? In the course of upgrading your truck, these are just some of the questions you may ask yourself. That's why we've assembled a series of product guides, covering everything from air intakes to vent visors. With clear explanations of the features and benefits of our numerous aftermarket products, as well as detailed images of the items themselves, RealTruck product guides are designed to give you the information you need to get the right accessories for your truck.