Rancho recently released their 4 Inch Crawler Short Arm System for the ’07-’17 Jeep JK. According to Rancho, “The NEW RS66114B Crawler Short Arm Kit is the result of continuous improvements done by Rancho to give you the best possible on and off-road experience for your JK. The kit includes progressive rate coil springs and fully adjustable control arms with D2 bushings to give you improved comfort, durability and worry free operation.” The kit also comes with heavy-duty front and rear adjustable track bars that feature PFTE Teflon for grease-free operation. This allows the sleeve to rotate in the bushing without resistance, which reduces overall war. Just a heads up – a Rancho exhaust crossover pipe is required for ’12-’17 models when not replacing the front driveshaft. Jeep owners using this kit can use 33, 35 or 37-inch tires. It also allows the centering of the axles as well as caster and pinion adjustment. No cutting or welding is required to install the 4 Inch Crawler Short Arm System. For more information on the Rancho 4 Inch Crawler Short Arm System, please visit their website or contact your local Rancho authorized retailer.