As soon as you modify your Mustangs ride height, you change your steering arm and tie rod angles. When this happens, you get bumpsteer. Some years of Mustangs had bumpsteer right off the dealer floor. With the Agent 47 Bumpsteer kit you get quality, grade 8 bolts, nuts, high strength rod ends, aluminum spacers and fine adjustment washers. Why pay more for the same product elsewhere?