The ICON Vehicle Dynamics 3" Lift Suspension System is designed for Jeep JK owner's demanding the ultimate in performance and ride quality, without the larger stance you find in bigger lift systems on today's market. ICON's Jeep Wrangler JK 3" lift system is engineered with front and rear dual rate progressive wound springs which is the foundation for on and off-road performance and suspension articulation. The dual rate design gives you a softer initial rate for superb on road comfort and a firmer than stock secondary rate that increases during compression for excellent bottom out control. ICON 2.5 Aluminum Series reservoir shocks are included front and rear to ensure optimum performance by increasing the duration of consistent damping regardless of situation, keeping the shocks at a cooler operating temperature during heavy use. The ICON CDC Valve upgrade is included in this stage for those desiring an easy way to tune the ride externally. Together the combination of ICON dual rate coils and 2.5 Aluminum Series shocks adds 30% more wheel travel over stock, helping you rock crawl safer or soak up larger terrain at higher speeds keeping those wheels on the ground. In this Stage 4 system adjustable track bars are included front and rear for optimizing axle position to ensure your axles are perfectly centered under the vehicle. Upgraded tubular steel upper & lower link arms are designed to add performance, strength, and improved alignment range. This ICON 3" JK lift system is designed from the ground up to give the Jeep Wrangler JK's the best performance, suspension handling / ride quality, and clearance for 33" tall tires (35" tall with installation of aftermarket high-clearance fenders).