FOX 987-24-032 Fox 2.5 Performance Series IFP HTO Front Shock w/ 4-6" Lift | 2011-2019 GM Sierra/Silverado 2500HD/3500HD

Features:

• Fits 2011–2019 GM 2500HD/3500HD trucks
• Supports 4 to 6 inches of lift
• 2.5" aluminum body for heat management
• Corrosion-resistant Type II anodized finish
• Internal Floating Piston (IFP) ensures consistent damping
• Hydraulic Top Out (HTO) smooths rebound forces
• Ideal for trucks with aggressive tire setups
• 5/8" hard chrome-plated shock shaft
• High-flow, velocity-sensitive damping control
• Vehicle-specific tuning for better ride quality
• Not compatible with lift kits that alter mounts
• Direct bolt-on install, no cutting required

Get The Most Out Of Your Lifted HD Truck

If you’ve taken your GM 2500HD or 3500HD to a full 4 to 6 inches of lift, the FOX 2.5 Performance Series IFP HTO front shock is exactly what your suspension needs to match that stance with control and comfort. This isn’t just a flashy upgrade, it’s a serious performance enhancer built for the demands of heavier tires, aggressive terrain, and real-world driving. Whether you're hauling gear, crawling through ruts, or just trying to make that lifted ride feel a bit smoother on the highway, this shock delivers. It features Hydraulic Top Out technology to reduce that jarring rebound you sometimes get after big hits, which really helps when your truck is carrying added weight or rolling on oversized tires. The result is better ride quality, less fatigue on your components, and more confidence behind the wheel. Plus, the tough anodized aluminum body sheds heat quickly and holds up against corrosion, so you can rely on it in any environment. With a bolt-on design made for factory-style mounting points, this shock goes on easy and transforms the way your lifted truck handles.

Built For Big Lifts And Serious Suspension Demands

The FOX 987-24-032 front shock is purpose-built for trucks running a 4 to 6 inch lift, giving you the damping control needed to support more suspension travel without sacrificing ride quality. It features a large-diameter 2.5-inch body made from impact-extruded 6061-T6 aluminum, which allows for greater oil capacity and better heat dissipation. A Type II clear-anodized finish adds a layer of protection against rust and wear, extending the lifespan of the shock under harsh conditions. Inside, the Internal Floating Piston (IFP) design maintains consistent damping by keeping the shock oil and nitrogen gas separate, even under extreme use. Hydraulic Top Out (HTO) technology kicks in to control rebound at full extension, minimizing harsh top-outs when your suspension unloads quickly, something that’s especially helpful on rough trails or with larger tire setups. The 5/8-inch chrome-plated shaft adds strength and durability, while high-flow, velocity-sensitive valving ensures that the shock responds smoothly across a variety of speeds and terrains. This unit is specifically tuned for the 2011–2019 Silverado and Sierra HD platform and is only compatible with lift kits that retain the factory mounting geometry.

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

Notes:

• Compatible with 2011–2019 GM 2500HD/3500HD trucks
• Designed for 4–6 inch front suspension lifts
• Not for use with lift kits altering OE mounts
• 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