Ford F-150 is a popular truck, so there is a wide range of aftermarket parts and upgrades to choose from. All of them will serve a particular purpose, although some may be more useful than others. On the outside, a lift kit improves its offroad capabilities, while a bull-bar and fender flares add protection. Inside, custom-fit seat covers and floor mats will keep the upholstery clean and give the truck a more luxurious feel.