This set of comes with 2 RS9000XL Series front struts and 2 RS9000XL Series rear shocks. Recognized as the first nine-position manually adjustable shock series in the off-road market. Nine-position easy-to-adjust knob allows customized damping control and firmness for on-road and off-road flexibility. Struts raise front lift height by 2 in. Nitrogen gas pressurized to 120 PSI to minimize air-to-oil mixture and reduce damping performance fade and foaming. Features an application-specific 18mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas and 1.25-in. sintered iron piston for enhanced structural integrity. Up to 2.75-in. tri-tube body (application specific) filled with all-weather fluid allows for cooler operation, increased vehicle control and ability to withstand internal temperatures of -40 to 248°F. Polyurethane rebound bumper and bushings and graphite-filled fluon-banded piston help absorb ride harshness and enhance responsiveness to changing road conditions for an overall smoother ride. Low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression while the long-lasting premium liquid metallic finish and polyvinyl protective boot ensures long life. Buy with confidence, this set comes with Rancho's limited lifetime warranty. This set is compatible with 2009-2012 FX4, King Ranch, Lariat, Platinum, STX, XL, XLT with 0" Rear Lift and w/o 8200 lbs gross vehicle weight.