Hotchkis Sport Suspension 80121-1 Stage 1 TVS Kit for 2013+ Dodge Challenger. High performance springs 2 1/8 in. front drop and 1.8 in. rear drop on RT and 13/16 in. (21 mm) front drop 1-1/4 in. (32mm) rear drop on SRT models. Lightweight Tubular 1.5 in. front sway bar and 3/4 in. tubular rear sway bar in a durable gloss black powder coat finish. Includes greasable polyurethane bushings and mounts for rear give you everything you need for direct bolt-on installation with no vehicle modifications. The Hotchkis Sport Suspension Stage 1 TVS system for the 2013+ Dodge Challenger RT & SRT offers a sleek lowered stance dramatically improved handling and superior driver control by reducing body roll improving steering response while giving you a sleek lowered stance with sporty yet comfortable ride. Allows suspension tuning for optimum track or street performance. Our engineers poured over track testing data to develop a balanced handling system comfortable enough for the street but well balanced for the occasional track day or your favorite twisty road. The system is comprised of lowered higher rate sport coil springs paired with front and rear lightweight sway bars. All components are manufactured in the USA come with complete hardware greasable bushings and are finished off in a durable powder coated finish. This bolt on upgrade can transform your Challenger into a canyon carver in minutes. Some 2013+ Dodge Challenger RT's are equipped with self leveling shocks. If your model has self leveling rear suspension the rear shocks will need to be changed in order to lower the vehicle. Hotchkis offers a kit which includes the rear shocks.