Nine Levels of Performance: RS9000XL strut with nine-position easy-to-adjust knob to allow customized damping control and firmness for on-road and off-road flexibility Reduces Fade: Nitrogen gas pressurized to 120 PSI to minimize air-to-oil mixture and reduce damping performance fade and foaming Built to Last: The low-friction, self-lubricating seal retains gas and oil, enabling quicker rebound and smoother compression; the long-lasting premium liquid metallic finish and polyvinyl protective boot ensure exceptional durability Buy with Confidence: Knowing that Rancho QuickLIFt struts are backed by Rancho’s limited lifetime warranty, you can purchase these struts with confidence Vehicle Compatibility: These Rancho QuickLIFT struts are designed to fit 2007-2013 Silverado 1500 & Sierra 1500 with 2” lift & without electronic adjustable suspension Enhance your driving dynamics with Rancho's QuickLIFT loaded struts! Rancho QuickLIFT loaded assemblies provide an all-in-one solution for leveling and lifting late model trucks and SUVs. This complete assembly simplifies installation with application-specific coil springs and upper mounting plates, removing factory rake for an aggressive stance. The assembly delivers 2 inches of additional lift to accommodate larger tires up to 275/60R20, enhancing ground clearance (depending on application) and custom style. Featuring the RS9000XL strut with a 9-position adjustment knob, the assembly offers customizable damping control and on or off-road performance flexibility. Nitrogen gas pressurized to 100 PSI minimizes air-to-oil mixture, reducing damping fade and foaming, while the long-lasting premium finish and protective boot ensure lasting durability. Backed by Rancho's limited lifetime warranty. - Vehicle Compatibility: Fits 2007-2013 Silverado 1500 & Sierra 1500 with 2” lift & without electronic adjustable suspension.