Fox 2011+ GMC Sierra 2500 HD 1.5-2.5in Lift Rear 2.5 Performance Series Smooth Body IFP HTO Shock

When you're looking to improve how your 2011-2025 Chevrolet Silverado 2500 HD or GMC Sierra 2500 HD handles both on the pavement and out on the trail, this Fox Performance Series rear shock is a solid option. It's built to give you a more comfortable ride during daily driving while still offering predictable control when you encounter tougher off-road conditions. This shock is designed to work with trucks that have a 1.5 to 2.5-inch rear lift.

The shock body itself is made from impact-extruded 6061-T6 aluminum, which is then clear-anodized for corrosion resistance. Inside, it uses a race-proven damping system with a high-flow, velocity-sensitive design that adjusts to terrain changes. The internal floating piston (IFP) separates the shock oil from the nitrogen gas, helping to prevent aeration and maintain consistent performance. Plus, the Hydraulic Top Out (HTO) piston helps cushion the suspension at full extension, preventing harsh bottoming out.

This shock is application-specific, meaning it's valved to match the weight and suspension characteristics of your heavy-duty truck. It also features a 5/8-inch hard chrome shaft for durability. Because it's fully rebuildable and re-tunable, you can service it to keep it performing at its best for a long time.