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🧾 Overview
The FOX 2.5 HTO Performance Series Front Shock is a direct replacement suspension upgrade designed for 2005–2026 Ford Super Duty F250 and F350 trucks running stock height up to a 1.5" front leveling spacer. Engineered to improve ride quality and suspension control, this shock delivers consistent performance both on-road and off-road.
Built with FOX’s 2.5" impact-extruded aluminum shock body, this performance shock provides increased oil capacity and improved heat dissipation compared to factory shocks. The Internal Floating Piston (IFP) monotube design separates nitrogen gas from shock oil to prevent aeration and maintain consistent damping performance.
FOX’s Hydraulic Top Out (HTO) technology adds position-sensitive rebound damping that reduces harsh top-out events. This improves ride comfort and suspension control—especially on trucks running larger tires, additional weight, or mild lift setups.
✔ 2.5" aluminum shock body for improved performance
✔ Hydraulic Top Out (HTO) technology reduces harsh top-out events
✔ Internal Floating Piston (IFP) monotube design
✔ High-flow velocity-sensitive damping
✔ Direct bolt-on replacement for factory front shocks
🛠 Installation
- Direct bolt-on installation using factory suspension mounting locations.
- Designed for vehicles with stock height up to 1.5" front leveling kits.
- Alignment recommended after installation.
📌 Specs
- Hydraulic Top Out (HTO) Technology Position-sensitive rebound damping reduces harsh top-out events and improves ride comfort.
- 2.5" Impact-Extruded Aluminum Body Increases oil capacity and improves heat dissipation for consistent performance.
- Internal Floating Piston (IFP) Separates nitrogen gas from shock oil to prevent aeration and maintain damping consistency.
- Velocity-Sensitive Damping High-flow piston design adapts to changing terrain and driving conditions.
- Hard Chrome-Plated Shaft Durable 5/8" steel shaft provides long service life and improved strength.
- Direct Bolt-On Installation Designed as a simple upgrade using factory mounting locations.
📘 Specifications
- Brand: FOX Shocks
- Series: 2.5 HTO Performance Series
- Shock Type: Monotube IFP
- Position: Front
- Lift Compatibility: 0–1.5" Lift
- Body Diameter: 2.5"
- Shock Body Material: 6061-T6 Aluminum
- Shaft Diameter: 5/8" Hard Chrome Steel
- Adjustability: Non-adjustable
- Installation Type: Direct Bolt-On
- Sold As: Single
📦 What’s Included (What’s in the Box)
- Front Suspension Components
- (1) FOX 2.5 HTO Performance Series Front Shock
- (AX4000 / FOX 987-24-000)
- Installation Components
- Application-specific mounting hardware
🛡 Warranty
- Axiom No-Nonsense Lifetime Warranty
⚠️ Fitment Notes
- Ford F250 Super Duty (2005–2026) – 4WD
- Ford F350 Super Duty (2005–2026) – 4WD
⚠️ Fitment Notes
- Designed for vehicles with stock height up to 1.5" front lift.
- Compatible with factory suspension and most leveling kits.
- Alignment recommended after installation.