Fox Shocks 2.5 Performace Series 4WD (987-24-021) for 2017-2025 Powerstroke 6.7L

Fox Shocks 2.5 Performance Series 4WD (987-24-021) for 2017–2025 Powerstroke 6.7L

Suspension Upgrade Built for Super Duty Performance

The FOX 2.5 Performance Series shock is engineered to improve ride quality, control, and durability on 2017–2025 Powerstroke 6.7L Super Duty trucks equipped with 4WD. Designed as a direct bolt-on replacement, this shock increases damping capacity while maintaining a comfortable ride on pavement. At the same time, it delivers improved stability and control when driving off-road or over uneven terrain.

Larger Shock Body and Internal Floating Piston Design

At the core of this suspension upgrade is a 2.5-inch aluminum shock body paired with a larger internal piston. This design increases oil volume, which helps maintain consistent damping during demanding conditions. Additionally, the shock uses an internal floating piston (IFP) to separate shock oil from high-pressure nitrogen gas. Because of this design, aeration is reduced and damping performance remains stable even during extended use.

Hydraulic Top Out Technology for Improved Ride Comfort

A key feature of this shock is Hydraulic Top Out (HTO) technology, which provides position-sensitive rebound damping. When the suspension reaches full extension, shock oil is routed through a secondary shim stack to slow shaft speed. As a result, harsh top-out impacts are reduced. This technology is especially beneficial for trucks running heavier wheels and tires or suspension setups that sit higher than factory specifications.

Heat Dissipation and Corrosion Resistance

Equally important, the shock body is constructed from Type II anodized aluminum, which efficiently dissipates heat while resisting corrosion. This helps maintain consistent performance during towing, off-road use, or aggressive driving. Because heat is managed more effectively, damping remains predictable even under repeated suspension cycling.

Direct Bolt-On Installation with Vehicle-Specific Valving

The FOX 2.5 Performance Series HTO shock features vehicle-specific valving tuned for the Super Duty platform. Installation is fully bolt-on and does not require cutting or fabrication. Therefore, this upgrade is ideal for owners seeking improved ride quality and control without complex suspension modifications.

Designed for Control, Comfort, and Capability

Ultimately, these shocks are well suited for drivers who want improved suspension performance across a wide range of driving conditions. Whether used for daily driving, towing, or off-road travel, this shock provides controlled damping and enhanced comfort while maintaining long-term durability.