Rancho RS7000MT Dual Steering Stabilizer Kit - 05-15 Ford F-250 / F-350 Superduty 4WD Part Numbers RS64551 and RS7405 Dual Steering Stabilizer Kit; Incl. RS6524B or RS6525B 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.