Featuring a unique, exclusive valving system and advanced compression functionality, Rancho® RS5000™X shocks deliver improved overall on- and off-road handling and performance.\nRancho RS5000X RS55179 Shock Absorber\n1987-1991 Isuzu Trooper (Rear) (Drive: 4WD / Qualifier: with Rear Raised Height 0 (in) to 1.0 (in)); 1981-1996 Ford Bronco (Front Forward) (Qualifier: with Factory Equipped Quad Shocks, with Front Raised Height 4 (in)); 1981-1996 Ford F-150 (Front Forward) (Drive: 4WD / Qualifier: with Factory Equipped Quad Shocks, with Front Raised Height 4 (in)); 1977-1979 Ford F-250 (Rear) (Drive: 4WD / Qualifier: From 03/1977, with Rear Raised Height 0 (in), RS8125 Axle Shim Kit may be Required on Rear Axle for Shock-to-Axle Clearance)