Rancho RS5000X Rear Shock for 1998-2004 Nissan Pathfinder and Infiniti QX4 (RS55391)

Fits select 1998-2004 Nissan Pathfinder and 1999-2003 Infiniti QX4.

The Rancho RS5000X RS55391 rear shock absorber is engineered for drivers who demand consistent control and ride quality on and off the road. Utilizing Cross Tuned technology, this shock features a unique progressive engagement valving system that reduces initial impacts at low speeds while maintaining firm control during high-demand maneuvers. The twin-tube design is pressurized with nitrogen gas to 150 PSI to minimize oil aeration and damping fade.

• Durable Construction: Features a 16mm nitro-carburized piston rod for superior scuff and corrosion resistance and a 35mm sintered iron piston for structural integrity.
• Advanced Valving: Progressive Engagement Valving (PEV) and a custom-tuned Compression Control Valve regulate fluid transfer to absorb impacts without disc flutter.
• All-Weather Performance: Filled with all-weather fluid capable of withstanding internal temperatures from -40 to 248°F, ensuring reliable operation in extreme conditions.
• Smooth Operation: Equipped with a fluon-banded piston for better responsiveness, plus a polyurethane rebound bumper and rubber bushings to absorb harsh road vibrations.
• Heavy-Duty Design: Includes double-welded loops at stress areas and a protective polyvinyl boot to shield the seal and rod from debris.

Specifications:

• Series: RS5000X
• Position: Rear
• Gas Pressurized: Yes (150 PSI Nitrogen)
• Piston Diameter: 35mm
• Rod Diameter: 16mm
• Body Type: Twin-Tube
• Manufacturer Part Number: RS55391

Vehicle Fitment: