4-door models;Front and rear replacement coil springs;Front and rear 2.5 Extreme-Duty Monotube Shocks;Front and rear cam bolts for caster and pinion adjustment;Front and Rear Bump stops;Rear track bar bracket;Adjsutable track bar;Extended sway bar end links;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 Raising the bar once again Rubicon Express brings the Off-Road industry a great performing, low cost suspension system for the Wrangler JL. Rubicon Express uses their expertise to create an affordable, budget minded suspension package that is packed with impressive features and provides outstanding performance, creating a smooth ride on road and on the trail. The control arms and other components are retained.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.