2017–2026 Ford F-250/F-350 Super Duty Rear Fox 2.5 Performance Series HTO Shock (0–1.5" Lift)

Upgrade your suspension with the Fox 2.5 Performance Series HTO Shock, engineered to deliver increased damping capacity, improved control, and enhanced ride comfort both on and off the road. This bolt-on shock features position-sensitive Hydraulic Top Out (HTO) technology, vehicle-specific valving, and a large 2.5-inch shock body designed to handle demanding conditions. The internal floating piston (IFP) separates shock oil from high-pressure nitrogen to maintain consistent performance, while the Type II anodized aluminum body efficiently dissipates heat and resists corrosion. HTO technology provides controlled rebound damping by forcing oil through a secondary shim stack, reducing harsh top-outs and smoothing out suspension movement—especially beneficial for vehicles running larger, heavier tires or operating above factory ride height. Built for durability and performance, this shock offers a noticeable improvement in ride quality, stability, and overall suspension control.

Key Features

• 2.5" impact extruded 6061-T6 aluminum shock body
• Type II clear-anodized body plating for corrosion resistance
• High-flow, velocity-sensitive damping for improved ride control
• 5/8" hard chrome shaft for strength and durability
• Internal floating piston (IFP) for consistent, fade-resistant performance
• Hydraulic Top Out (HTO) piston for controlled rebound and reduced harsh top-outs
• Performance Series design tuned for on-road comfort and off-road capability
• Eyelet upper and lower mounting configuration
• Optimized for 0–1.5" lift applications

Specifications

• Series: Performance
• Travel: 10.79"
• Extended Length: 29.58"
• Compressed Length: 18.79"
• Top Mount: Eyelet
• Bottom Mount: Eyelet

Construction & Design

Built with a large 2.5-inch aluminum body, this shock is designed to handle increased heat and stress compared to standard shocks. The internal floating piston ensures consistent damping by keeping oil and nitrogen separated, while the high-flow piston design improves responsiveness across varying terrain. The addition of Hydraulic Top Out technology enhances ride quality by controlling rebound at full extension, making it ideal for lifted vehicles or setups with added weight.

Installation

Estimated Install Time: 1–2 hours

• Direct bolt-on installation
• No special tools required
• Reuses factory mounting hardware

Fitment

Rear Application Only

• Fits 2017–2026 Ford F-250 & F-350 Super Duty
• Includes XL, XLT, Lariat, King Ranch, Platinum, and Limited trims
• Designed for vehicles with 0–1.5 inches of lift
• 4WD Only Applications:
  • 2017–2026 F-250 & F-350 configurations originally equipped with 4WD-specific rear shock mounting
• 2WD & 4WD Compatible Applications:
  • Confirmed coverage includes:
    • 2025 F-250 (King Ranch, Lariat, Platinum, XLT)
    • 2023–2026 F-350 (King Ranch, Platinum)
    • 2018–2024 F-350 Limited

Notes

• Sold individually
• Always confirm fitment before installation
• Professional installation recommended