The Detroit Speed Heavy Duty Leaf Spring Pocket Kit was engineered to work with stock leaf spring cars as well as cars with the Detroit Speed QUADRALink installed. The kit is significantly stronger than the stock pocket, connects into the doubler plate on the top side floor plan and offers an additional link mounting location that is 1" lower than the stock location. The assembly is bolt-on for easier installation and may be removed after painting. The lower link pocket comes powder coated and the kit comes with all hardware for installation.