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 RS55610 Shock Absorber\n2004-2012 Chevrolet Colorado (Front) (Front Spring: Torsion Bar / Qualifier: with Rancho Suspension System, with Front Raised Height 4.0 (in), Shocks are 30 (mm) Bore); 2004-2012 GMC Canyon (Front) (Front Spring: Torsion Bar / Qualifier: with Rancho Suspension System, with Front Raised Height 4 (in), Shocks are 30 (mm) Bore)