Engineered in conjunction with Eibach Spring Company, our lowering spring kits for late model Mustang, Camaro and Challenger owners are engineered for the daily driver looking for a better ride stance while retaining a good ride quality. Utilizing progressive rate coiling technology and only the highest quality materials these lowering spring kits are designed to meet or exceed the longevity of the factory units. Expect a drop of approximately 1-1/2” on most applications)