Part Numbers RS999921 and RS999937 Front Pair of Struts & Springs Fits 2WD & 4WD vehicles Front height not adjustable from specified height. 9 settings of compression and dampening adjustment. Rancho's limited lifetime warranty protects against defects and premature failure. Rancho's 90 day ride guarantee covers RS5000X, RS7000MT, and RS9000XL shocks. Award-winning Rancho QUICKLIFT Loaded assemblies level and lift late-model trucks and SUVs, providing an aggressive stance and allowing for the use of larger wheel and tire packages without the cost of a complete suspension system or the long installation time. Each Rancho quickLIFT Loaded unit is a gas charged complete modular assembly that includes an application-specific, installed coil spring and upper mounting plate to simplify installation. Engineered with the globally renowned and exclusive RS9000XL nine position adjustability, Rancho quickLIFT Loaded units improve performance and provide the ability to manually tune the vehicle's ride to suit terrain and driver preference. Covered by a Limited Lifetime Warranty and 90-Day Free-Ride Offer.