4-door models;Kit includes: Front and rear coil springs;Disconnecting front sway bar end links;Rear sway bar end links;Bump stops;Track bar mount;Shock extensions;Front and rear 2.5 Extreme-Duty Monotube Shocks;Front track bar;Front upper and lower Super-Flex control arms;Rear upper and lower Super-Flex control arms;2.5 body outer diameter with full bore piston to maximize damping capability;6061-T6 Impact forged aluminum bodies for increased strength and lower shock temperatures;Hard anodized body finish for durability and reduced friction;Tuned specific to Rubicon Express spring rates to maximize ride quality and suspension travel;17-4 Stainless Steel chrome plated shaft for strength and corrosion resistance;3/4 OD shaft for reduced seal friction and gas force;Internal floating piston separates nitrogen and oil to improve damping response and eliminate cavitation;Redundant seal package;Shocks are hand made in the USA by Walker Evans; California Residents: WARNING The Rubicon Express 1.5 Super-Flex suspension system for the JL owner who wants a more affordable price. The lower control arms of your JLs suspension are upgraded with our Super-Flex front control arms while the stock upper control arms are retained. The 1.5 Super-Flex system will improve the trail flexibility of your JL while retaining a comfortable street ride. The new Rubicon Express 2.5 Monotube shock design delivers superior performance for your Jeep in all types of terrain. The foundation of the shock starts with a hard-anodized thick wall impact forging. The forging gives the shock body added strength, while the aluminum allows quick heat dissipation. The hard anodizing not only gives a great appearance but reduces friction and bore wear. An added benefit is rust issues are eliminated that steel bodies are prone to. This new lineup features 17-4 stainless steel precipitation hardened shafts that are chrome plated for maximum corrosion and abrasion resistance. Thick wall steel sleeves are housed inside the cross-linked urethane bushings for extreme durability. Each part number is specifically tuned to match the vehicle application.