Rancho RS5000X Gas Shock Set 2005-2016 Ford F250 Super Duty 4WD Part Numbers RS55042 and RS55254 Set of 4 Shocks for vehicles at factory height or w/0-2" front Lift and w/0-2" 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.