Fox 2011+ GMC Sierra 2500/3500 HD 4in Lift Rear 2.5 Performance Series Smooth Body IFP HTO Shock

FOX Performance Series shocks contain the latest in shock technology to transform the performance of your Truck or SUV. They use our race-proven damping control to provide a comfortable on-road ride and predictable off-road handling in even the toughest conditions.

Additional Information

Application specific valving to maximize performance.

Part Type

Suspension Shock Absorber

Product Overview

Increase your vehicle's off-road capability by extending drop-out travel in most applications. Experience on-road comfort with performance-minded shock valving for a connected ride with less vehicle sway. Tuned specifically for your vehicle’s application.

Consistent and fade-resistant performance due to high-quality materials: aluminum bodies, race-developed main piston, and a true internal floating piston (IFP) to separate gas and oil.

Built-to-last, torture-tested and race-proven to give a lifetime of great rides. FOX products are built from aluminum, dissipating heat four times better than conventional materials. All FOX shocks are fully serviceable and resistant to corrosion and harsh environments.

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• 2.5 in. Impact Extruded 6061-T6 Aluminum Shock Body
• 2.5” Impact extruded 6061-T6 aluminum shock body
• 5/8 in. Hard Chrome Shaft
• 5/8” hard chrome shaft
• Application specific tune
• Corrosion resistant
• Fully rebuildable and re-tunable
• High-flow velocity-sensitive damping
• Hydraulic Top Out (HTO) piston
• Hydraulic Top Out [HTO] Piston
• Internal floating piston (IFP)
• Internal Floating Piston [IFP]
• Type II clear-anodized body plating

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

2.5 Performance Series Shocks, 11-ON GM 2500/3500, rear, 4-6" LIFT