2017–2026 Ford F-250/F-350 Super Duty Rear Fox Performance Elite Series 2.5 Reservoir Shock (4–6” Lift) 2wd & 4wd

Upgrade your suspension with race-proven performance and precision control. The Fox Performance Elite Series 2.5 Reservoir Shock is engineered to deliver exceptional ride quality both on and off the pavement. Drawing directly from FOX’s off-road racing heritage, these shocks are built to perform under extreme conditions—far beyond what most drivers will encounter—while giving your truck the confidence, control, and durability needed for any terrain.

Key Features

Performance tuned for vehicle-specific applications
2.5" smooth body, impact-extruded and CNC-machined 6061-T6 aluminum construction
Hard-anodized body for corrosion resistance and long-term durability
External reservoir for improved cooling and consistent damping
Increased oil and nitrogen capacity for fade resistance under heavy use
Black-anodized CNC-machined 6061-T6 billet aluminum components
7/8" hard chrome plated heat-treated alloy steel shaft
Race-developed high-flow piston design
Application-specific valving for optimized performance
Redundant sealing system (main seal, wiper seal, scraper seal)
PTFE-lined, heat-treated alloy steel spherical bearings
Eyelet upper and lower mounts
Designed for 4–6" rear lift applications
13.58" travel
Extended length: 34.93"
Collapsed length: 21.35"

Construction & Design

Built with a smooth body 2.5-inch shock design, the Performance Elite Series features an external reservoir that significantly increases oil and nitrogen volume. This allows for better heat dissipation and more consistent damping during aggressive driving or extended use. The reservoir not only improves performance but also delivers a clean, race-inspired look.

Performance Benefits

Superior ride quality on and off-road
Increased suspension control in rough terrain
Reduced shock fade during extended or aggressive use
Confidence-inspiring handling for heavy-duty trucks
Race-proven durability and reliability

Installation

Estimated Install Time: 1–2 hours

These shocks are designed as a direct bolt-on replacement, making installation straightforward with standard hand tools.

Fitment

Ford Super Duty Rear (4–6” Lift Applications):

Fits 2WD & 4WD Models

2025 Ford F-250 Super Duty (King Ranch, Lariat, Platinum, XLT)
2023–2026 Ford F-350 Super Duty (King Ranch, Platinum)
2018–2024 Ford F-350 Super Duty Limited

4WD Models Only

2017–2026 Ford F-250 Super Duty

Includes:
XL (2025), All Trims (2017–2024, 2026)

2017–2026 Ford F-350 Super Duty

Trims Include:
King Ranch (2017–2022),
Lariat (2017–2026),
Platinum (2017–2022),
XL (2017–2026),
XLT (2017–2026)

What’s Included

(2) Fox Performance Elite Series 2.5 Reservoir Rear Shocks

Installation Notes

Install on a properly supported vehicle
Torque all hardware to manufacturer specifications
Alignment may be recommended after installation