Rancho RS5000X Twin-Tube Shock Absorber for Select Ford F-150 2004-2025 (RS55287)

Fits select 2004-2025 Ford F-150 and 2006-2008 Lincoln Mark LT. The Rancho RS5000X (RS55287) is a gas-pressurized shock absorber engineered for trucks that transition between the street and the trail. At the core of the RS5000X is Rancho’s exclusive Cross Tuned technology, featuring a progressive engagement valving system that reduces initial impact harshness at low speeds while providing firm control during aggressive driving or heavy loads.

Constructed with a large 2.25-inch twin-tube body, this shock is designed for maximum fluid capacity and cooler operation in extreme environments. The internal 150 PSI nitrogen gas charge minimizes the air-to-oil mixture, effectively preventing performance fade and foaming. For long-term durability, the unit features a 16mm nitro-carburized piston rod to resist corrosion and double-welded loops at critical stress points.

• Precision Control: 35mm sintered iron piston and fluon-banded design enhance responsiveness and structural integrity.
• Extreme Temperature Resilience: All-weather fluid ensures consistent damping performance from -40 to 248°F.
• Advanced Sealing: Low-friction, self-lubricating seal maintains gas charge and oil for faster rebound and smoother compression.
• Ready for the Elements: Includes a polyvinyl protective boot to shield the rod and seals from dirt and road debris.
• Technical Specs: Nitrogen pressurized to 150 PSI; 16mm rod; polyurethane rebound bumper; rubber bushings.