Featuring a unique, exclusive valving system and advanced compression functionality, Rancho�� RS5000���X shocks deliver improved overall on- and off-road handling and performance. Rancho RS5000X RS55325 Shock Absorber 2004-2012 Chevrolet Colorado (Rear) (Front Spring: Torsion Bar / Qualifier: with Rancho Suspension System, with Rear Raised Height 2.5 (in), without Rear Aluminum Driveshaft); 2004-2012 GMC Canyon (Rear) (Front Spring: Torsion Bar / Qualifier: with Rancho Suspension System, with Rear Raised Height 2.5 (in), without Rear Aluminum Driveshaft)