Rancho RS9000XL Adj Shock Set 1999-2004 Ford F350 Super Duty 4WD w/2.5-4" Lift Part Numbers RS999254 and RS999264 Set of 4 Shocks for vehicles w/2.5-4" front Lift and w/2.5-4" rear Lift Fits 4WD vehicles All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Rancho's limited lifetime warranty protects against defects and premature failure. Rancho's 90 day ride guarantee covers RS5000X, RS7000MT, and RS9000XL shocks.