Improved Handling and Performance: Cross Tuned technology featuring exclusive rebound valving system and advanced compression phase improves overall handling and performance Minimizes Rough Ride: Exclusive Progressive Engagement Valving is custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimizes a rough ride Strong and Durable: Features a 16mm nitro-carburized piston rod to reduce scuffs & corrosion, double-welded loops at stress areas Handles Extreme Temperature Changes: Large twin-tube body filled with all-weather fluid allows for cooler operation Fitment: compatible with 2004 2008 F150 4WD with 0 inch rear raised Height Raises Front 2.5 in, 2006 2008 Mark LT 4WD with 0 inch rear Lift Raises Front 1.5 in This kit consists of two Rancho QuickLIFT RS999910 Suspension Strut and Coil Spring Assemblies and two Ranch0 RS55286 Suspension Shock Absorbers. RS5000X Gas Shock, The core of this new and innovative shock from Rancho is the unique and patented rebound valving system and an advanced compression phase of the shock absorber. This proprietary process developed by the ride engineers at Rancho will elevate the overall handling and performance of your vehicle on and off-road. Each RS5000X shock is gas pressurized to 150 PSI.* The twin tube, gas pressurized shock has a variety of advantages including minimizing air-to-oil mixture that can cause foaming and shock fade. Rancho's Quicklift Loaded leveling solutions provides an easy to install kit right out of the box, no modifications required. The added lift of the Quicklift units provide additional clearance and height in the front of your vehicle to remove the factory rake, and to fit larger wheels and tires. Along with the leveling solution, all Quicklift units utilize Rancho's RS9000XL 9 position adjustability, allowing the driver to fine tune their ride from very soft to very firm. Fits: 2004-2008 F150 4WD with 0 inch rear raised Height Raises Front 2.5 inch, 2006-2008 Mark LT 4WD with 0 inch rear Lift Raises Front 1.5 inch