Fox 11-25 GMC Sierra 2500/3500 HD 2.5 Performance Series 5.1in Lift Smooth Body IFP HTO Shock

The 2.5-inch impact-extruded 6061-T6 aluminum body on this FOX Performance Series shock is built tough. This shock is designed to give your GMC Sierra 2500 or 3500 HD a more comfortable ride on the road while still handling rough terrain when you take it off-road. It uses race-proven damping technology to make sure your truck handles predictably, no matter the conditions.

Inside, you'll find a high-flow, velocity-sensitive damping system paired with an internal floating piston (IFP) and a hydraulic top-out (HTO) piston. This setup helps manage fluid and gas separation for consistent performance. The 5/8-inch hard chrome shaft is corrosion resistant, and the entire shock is application-specific tuned for your truck, meaning it’s valved to work best with your vehicle's weight and suspension characteristics. Plus, it's fully rebuildable and re-tunable, so you can keep it performing at its best for a long time.