Leaf spring front mount bolts in the factory location. The mount features both a GM factory mounting location and a +3/4″ raised location to change the anti-squat characteristics (known as the “Herb Adams mod”). Race proven and 100% Made In USA. Replaces factory front leaf spring mount 2 mounting locations available; Stock and ¾” raised (Herb Adams mod) Use of top mounting hole lowers rear of car approx 3/8” as compared to stock location Hardware included Race proven on the UMI ’71 Camaro 100% Made In USA