Get your 4-door Jeep® Wrangler JK Unlimited ready for a day on the trail with the Rancho® 2-in. Progressive Sport suspension system. This premium suspension system features front and rear progressive rate coil springs specifically tuned to deliver superior on-road comfort and off-road performance. Tested to comply with NHTSA FMVSS126, the kit works with the vehicle’s electronic stability system.. BUILT FOR THE TRAIL -- Designed to fit up to 33-in. tires, get 2-in. of additional ground clearance needed for off-road driving (can accommodate 35-in. tires with trimming; aftermarket bumpers, sliders, winches, etc. affect lift height). NOTES -- Compatible with Jeep factory electronic stability system, it allows the use of OE wheels and tires and is designed with 33-in. tires using 17-in. wheels with 4.5-in. backspacing (tire size varies between manufacturers). COMPLETE PERFORMANCE UPGRADE -- Transform your suspension with Rancho geometry correction bracket (RS62103) or combine with Rancho adjustable control arms (RS66155B, RS66156B and RS66157B, RS66158B); sold separately. COMPLETE SOLUTION -- Front and rear progressive rate coil springs, front bump stops, rear brake line relocation brackets and mounting hardware; shocks sold separately. SUPERIOR PERFORMANCE -- Front and rear progressive rate coil springs, specifically tuned to provide superior on-road comfort and off-road performance. EASY TO INSTALL -- Bolt-on installation for an easy upgrade that complies with NHTSA FMVSS126 standards. Rancho 07-18 Wrangler JK Coil Spring Kit - Master Part Number - One Box. BUY WITH CONFIDENCE -- Comes with Rancho’s limited lifetime warranty. COMPATIBILITY -- Designed for 4-door Jeep Wrangler JK Unlimited. Rancho RS66139B Suspension Lift Kit for Jeep Wrangler. Rancho Suspension Kit. Suspension Lift Kit. Suspension Kit

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