For Gladiator owners looking for a performance-minded, capable lift solution and a taller stance suitable for up to 37" tall tires, we offer our premium 69-6041 4" Terrain Flex Lift Kit. This system has been very well thought out and thoroughly developed. We engineered and tested this kit for months on interstate travel as well as numerous very extreme rock crawling adventures - Terrain Flex has the perfect blend of on-road manners and off-road mastery. The 69-6041 Terrain Flex lift kit features 4" lift replacement front springs that increase suspension travel and features a larger spring wire diameter to accommodate increased load capacities from heavy aftermarket accessories like winches and steel bumpers. For the rear, we opted to include a new top mount heavy-duty 1/4-wall steel coil spring spacer that allows you to retain the factory dual-rate springs. Jeep took great care to engineer the factory rear springs for optimum performance as both a truck and a Jeep. By retaining the factory rear coil spring, you retain the towing, hauling and driving performance originally engineered into the Gladiator. Adding even more exceptional value to our Terrain Flex system, we include new beefier . 188 wall lower control arms with our Terrain Control Technology (TCT) non-bonded, maintenance-free bushings. These new control arms aid in setting up the ideal caster geometry while providing outstanding performance on and off road. New longer sway bar end links, bump stop extensions and our heavy-duty adjustable front track bar really help to dial your Gladiator in for the best ride and flexing performance. To finalize the ideal Terrain Flex Lift Kit, we have partnered with Falcon to include Falcon 2. 1 mono tube performance shocks designed specifically for the JT Gladiator. When you combine all of our great Ready LIFT suspension components with the Falcon 2. 1 shocks, you get an outstanding 4" lift system that rides and drives better on road while providing incredible performance on the trails and rocks. Note: vehicles with adaptive cruise control will require zero-point calibration at the dealership after kit install.