FOX 987-24-011 Fox 2.5 Performance Series IFP HTO Rear Shock w/ 1.5-2.5" Lift | 2011-2025 GM Silverado/Sierra 2500HD/3500HD

Features:

• Fits 1.5-2.5" rear lift heights
• 2.5" zinc-plated shock body
• External reservoir for cooling and capacity
• 7/8" hard chrome-plated steel shaft
• Dual Speed Compression adjustability
• Race-developed high-flow piston design
• PTFE-lined spherical bearings for precision
• Black-anodized billet aluminum components
• Redundant sealing system for durability
• Optimized valving for GM HD trucks
• Improved ride on- and off-road
• Striking race-ready appearance

Conquer Every Road With Confidence And Control

If you're serious about getting the most out of your 2011-2025 GM Silverado or Sierra 2500HD/3500HD, the FOX 987-24-011 2.5 Performance Series IFP HTO Rear Shock is built to keep up. Whether you're towing heavy gear, hitting the trails, or just want a smoother ride around town, these shocks bring race-tested performance to your daily grind. They feature a beefy 2.5-inch zinc-plated steel body that doesn’t just look tough, it’s built to handle the worst roads and keep on going. The external reservoir adds both oil and nitrogen capacity, which means better cooling and less fade even during long hauls or off-road climbs. Ride quality gets a major upgrade too, with smoother damping that keeps your truck feeling planted and controlled on everything from washboard trails to cracked pavement. What’s great is that you can dial in the ride with the Dual Speed Compression adjuster, making it easy to switch things up depending on your load or terrain. It’s a shock that feels just as good under a full load as it does cruising empty down the highway. In short, these FOX shocks don’t just improve your ride, they give you more control, more confidence, and more capability wherever the road takes you.

Built To Perform In Every Tough Situation

FOX didn’t cut corners when they engineered the 987-24-011 rear shock. Starting with a large-diameter 2.5-inch body, it’s made from seamless steel with a corrosion-resistant zinc plating that keeps it protected in harsh environments. Inside, you’ll find a high-flow piston designed for smooth and efficient damping, even during demanding conditions. The hard chrome-plated, heat-treated 7/8-inch alloy steel shaft ensures long-lasting strength and minimizes wear over time. PTFE-lined spherical bearings give it tight, precise articulation, ideal for lifted setups where suspension geometry starts to get complex. The external reservoir not only boosts oil capacity but also helps keep operating temperatures stable, especially during heavy off-road use or long towing sessions. With its application-specific valving tailored for GM HD trucks, you're getting performance that’s custom-tuned to your exact setup. Add in the redundant sealing system and anodized billet aluminum components, and you’ve got a rear shock that’s engineered to take abuse, deliver results, and last the long haul.

Fits: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado/Sierra 2500HD/3500HD

Notes:

• Designed specifically for 2011-2025 Silverado and Sierra 2500HD/3500HD
• Compatible with trucks equipped with 1.5-2.5" rear lift
• Ideal for both on-road comfort and off-road performance
• Built using race-proven technology developed in harsh environments
• Includes external reservoir for added oil and nitrogen volume
• Dual Speed Compression adjuster allows on-the-fly tuning
• Sold individually, verify quantity needed for your application
• Requires proper suspension setup to match lift height
• Not intended for use on vehicles outside specified year and lift range
• Professional installation recommended for optimal performance
• May not be compatible with aftermarket suspension modifications beyond lift range

Install Instructions