Featuring a unique, exclusive valving system and advanced compression functionality, Rancho RS5000X struts deliver improved overall on- and off-road handling and performance. Product Features:IMPROVED HANDLING AND PERFORMANCE -- Cross Tuned technology featuring exclusive rebound valving system and advanced compression phase improves overall handling and performance on and off roadMINIMIZES ROUGH RIDE -- Exclusive Progressive Engagement Valving is custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimizes a rough rideSTRONG AND DURABLE -- Features a nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas and application-specific sintered iron piston for enhanced structural integrityHANDLES EXTREME TEMPERATURE CHANGES -- 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 Degrees FahrenheitSMOOTH 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 rideREDUCES FADE -- Nitrogen gas pressurized to 60 PSI to minimize air-to-oil mixture to reduce damping performance fade and foamingMAINTAINS 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 controlBUILT TO LAST -- Low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression while the application-specific piston delivers heightened control of shock motion due to expanded piston area