Rancho RS90000XL 4.5″ Lift Shocks for 2015-2016 Ford F-150 4WD

Description
Rancho RS90000XL 4.5″ Lift Shocks for 2015-2016 Ford F-150 4WD

Rancho RS9000XL 4.5″ Lift Shocks for 2015-2016 Ford F-150 4WD

Part Number: RS999838 / RS994287

Summary: The Rancho RS9000XL series provides industry-leading versatility for the Ford F-150 with its signature 9-position manual tuning technology. This complete set of four shocks allows drivers to instantly adjust damping levels from soft to firm to compensate for varying payloads or towing requirements. Specifically configured for vehicles equipped with a 4.5-inch lift, these shocks deliver a custom-tuned ride that balances highway comfort with rugged off-road control.

Features

• MyRide Tuning System: A 9-position manual adjustment knob provides clear, tactile damping changes to ensure the perfect ride for any load or terrain.
• Nitrogen Gas Pressurization: High-pressure gas charging provides reduced aeration and foaming to ensure consistent performance during aggressive driving.
• Large Shock Body: A heavy-duty 2.75-inch diameter body provides increased fluid capacity to ensure cooler operation and reduced fade under heavy use.
• Protective Boot: A durable polyvinyl accordion boot provides a physical barrier for the piston rod to ensure long-term seal integrity.

Technical Specifications

Fitment

• 2015-2016 Ford F-150 4WD
• Note: Fits models with 1-Piece Driveshaft and Rancho® RS66519B System. Excluding Harley-Davidson, SVT Raptor, and 8200 GVW packages.

What’s Included

• (2) RS999838 Front Adjustable Shocks
• (2) RS994287 Rear Adjustable Shocks
• Protective Dust Boots

Why Choose This Product?

• Engineering Advantage: Rancho’s tri-tube design and large-bore construction offer superior fluid volume compared to standard twin-tube shocks.
• Performance Benefit: The ability to manually firm up the suspension for towing and soften it for daily commuting provides a “no-compromise” driving experience.

Related Products

RS5000X (Front):
Rancho RS5000X 4.5" Front Lift Shocks for 2015-2016 Ford F-150 4WD

RS90000XL (Rear):
Rancho RS90000XL 4.5" Rear Lift Shocks for 2015-2016 Ford F-150 4WD

RS90000XL (Front):
Rancho RS90000XL 4.5" Front Lift Shocks for 2015-2016 Ford F-150 4WD

Frequently Asked Questions

Can I adjust these shocks while they are installed on the truck?
Yes, the 9-position knob is located at the base of the shock for easy manual adjustment without removing any hardware.

Do these shocks create the 4.5 inches of lift?
No, these shocks are specifically length-tuned to work with an existing 4.5-inch suspension lift system.

What is the benefit of the nitrogen gas charging?
Nitrogen gas prevents the oil from foaming (aeration) during rapid cycling, which maintains consistent damping force on rough roads.

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