Vehicle Compatbility: These rear shocks fits 1992-2005 Blazer with 0" Lift, 1992-1999 Yukon 4WD and 1995-2000 Tahoe with 1-2.5" 4WD and 1988-1999 C1500 C2500 C3500 K1500 K2500 K3500 with 0" Lift Smooth Performance: Polyurethane rebound bumper and rubber bushings help absorb ride harshness while the fluon-banded piston enhances responsiveness to changing road conditions for an overall smoother ride Maintains Vehicle Control: Compression Control Valve is custom-tuned for each vehicle to regulate fluid transfer to absorb impacts without disc flutter and help maintain shock motion control Minimizes Rough Ride: Exclusive Progressive Engagement Valving is custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimizes a rough ride Buy with Confidence: These RS5000X Series Pair of Rear Shocks comes with a Limited Lifetime Warranty Featuring a unique, exclusive valving system and advanced compression functionality, Rancho RS5000X shocks deliver improved overall on- and off-road handling and performance. The Rancho RS5000X is a gas-charged twin-tube shock absorber with a 2.25-inch diameter body, designed to improve both on- and off-road handling through its patented progressive valving. Key features include a 16mm nitro-carburized piston rod for durability, a 35mm sintered iron piston, a polyurethane rebound bumper, and an all-weather fluid that can withstand extreme temperatures. It aims to provide a smoother ride by minimizing rough impacts at low speeds and reducing shock fade through gas pressurization. Large twin-tube body filled with all-weather fluid allows for cooler operation, increased vehicle control and ability to withstand internal temperatures of -40 to 248°F. Nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixture to reduce damping performance fade and foaming. These rear shocks fits 1992-2005 Blazer with 0" Lift, 1992-1999 Yukon 4WD and 1995-2000 Tahoe with 1-2.5" 4WD and 1988-1999 C1500 C2500 C3500 K1500 K2500 K3500 with 0" Lift.