Fox 2017+ Ford F250 Super Duty 4-6in Lift Front 2.5 Performance Series Smooth Body IFP HTO Shock

The 2.5-inch impact-extruded 6061-T6 aluminum shock body on this FOX Performance Series shock is built tough for demanding conditions. This shock is designed to work with 4 to 6-inch lift kits on a range of trucks, including the 2017-2025 Ford F-250 Super Duty, F-350 Super Duty, and even the 2025 F-150 and Ranger. It uses race-proven damping control to give you a comfortable ride on the street and predictable handling when you head off-road.

Inside, you'll find a high-flow velocity-sensitive damping system that adjusts to terrain in real-time. The internal floating piston (IFP) separates the oil and gas, which helps prevent aeration and keeps the shock performing consistently. Plus, the hydraulic top-out (HTO) piston helps cushion the suspension at full extension, preventing harsh bottoming out. The 5/8-inch hard chrome shaft is corrosion resistant, and the entire unit is fully rebuildable and re-tunable, so you can keep it performing at its best for a long time.

This shock is application-tuned, meaning FOX has set up the valving specifically for the vehicles it fits, like the Ford F-250 and F-350 Super Duty models. This ensures you get the most out of your suspension setup.