FOX 987-24-031 Fox 2.5 Performance Series IFP HTO Front Shock w/ 1.5-3.5" Lift | 2011-2019 GM Sierra/Silverado 2500HD/3500HD

Features:

• Fits 2011-2019 GM 2500HD/3500HD trucks
• Supports 1.5 to 3.5 inches of lift
• 2.5" aluminum body for better heat dissipation
• Corrosion-resistant Type II anodized finish
• Internal Floating Piston (IFP) for consistent damping
• Hydraulic Top Out (HTO) for smoother rebound
• High-flow, velocity-sensitive valving
• 5/8" hard chrome-plated shock shaft
• Vehicle-specific valving for optimized control
• Reduces harsh top-outs under heavy loads
• Improves comfort with aggressive tire setups
• Direct bolt-on installation, no mods required

Conquer Every Road With Confidence And Comfort

If you're looking to take your GM 2500HD or 3500HD to the next level, the FOX 2.5 Performance Series IFP HTO front shock delivers exactly what your truck needs. This bolt-on upgrade transforms your suspension with enhanced control, better comfort, and the durability to handle anything from daily driving to serious off-road use. Thanks to its Hydraulic Top Out (HTO) technology, you'll notice a smoother rebound that keeps the ride comfortable even after adding heavier tires or lifting the truck beyond factory specs. The position-sensitive damping adapts to changing terrain, helping the shock absorb hits more effectively without compromising handling. Whether you're crawling over rocks, towing a loaded trailer, or just rolling over rough pavement, this shock is built to stay responsive and in control. Plus, the premium aluminum body resists corrosion and sheds heat quickly, making it ideal for demanding conditions. With easy bolt-on installation and a lift range of 1.5 to 3.5 inches, it's a smart upgrade that delivers performance without hassle.

Engineered For Precision Handling And Long Term Durability

The FOX 987-24-031 2.5 Performance Series HTO front shock is packed with technical features designed for serious performance. At the core is a 2.5-inch impact-extruded 6061-T6 aluminum shock body, built to be both lightweight and highly efficient at managing heat under stress. Its Type II clear-anodized finish protects against corrosion, even in harsh environments. Inside, the shock uses a nitrogen-charged internal floating piston (IFP) to keep the oil and gas separated, which helps maintain damping consistency over time and under varying loads. The advanced Hydraulic Top Out piston enhances rebound control by forcing oil through a secondary shim stack, especially useful when running oversized tires or high-lift setups. A 5/8-inch hard chrome shaft adds long-term durability and strength for aggressive use. With high-flow, velocity-sensitive valving and vehicle-specific tuning, it’s engineered to match the unique dynamics of 2011-2019 Silverado and Sierra HD trucks. All of this combines to deliver a balanced ride, better suspension articulation, and increased comfort whether you're off-road or on the highway.

Fits: 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GM Sierra/Silverado 2500HD/3500HD

Notes:

• Designed for 1.5" to 3.5" front lifts
• Compatible with 2011–2019 GM 2500HD/3500HD models
• Sold individually; purchase two for both front wheels
• Ideal for trucks with larger, heavier tires
• Direct bolt-on installation; no modifications needed
• Hydraulic Top Out (HTO) enhances rebound control
• Internal Floating Piston (IFP) maintains damping consistency
• Aluminum body efficiently dissipates heat
• Type II anodized finish resists corrosion
• 5/8" hard chrome shaft offers durability
• Vehicle-specific valving ensures optimal performance
• Fully rebuildable and re-tunable for longevity

Install Instructions