RockJock’s 4-inch lift coil spring set for the 2020 & up Jeep JT Gladiator directly replaces the factory coil springs and are designed to work with RockJock Johnny Joint® suspension systems or other manufacturer’s 3 to 5-inch lift kits. This set features 4-inch lift front springs and 3-inch lift rear springs to level the vehicle and to provide and improved ride. Extensive research was done by RockJock to develop the perfect combination of rates and quality of the coil springs. The results: they provide the best in comfortable ride and excellent performance off-road. Powder coated finish. If you need help choosing the correct springs for your Jeep – just call the RockJock sales staff! We have many variations of JT Springs available to accomodate off-roading, rock crawling or overlanding usage applications!