FOX 987-24-008 Front Performance Series 2.5 Smooth Body IFP HTO Shock 0-1" Lift | 2020-2025 GM 2500HD/3500HD

Features:

• Supports 0-1" front lift height
• External reservoir boosts cooling and capacity
• Dual Speed Compression adjuster for fine tuning
• 2.5" seamless zinc-plated steel shock body
• 7/8" chrome-plated alloy steel shaft
• Redundant sealing system for lasting protection
• Race-developed high-flow piston for smooth ride
• Application-specific valving for your GM HD truck
• PTFE-lined spherical bearings reduce friction
• CNC-machined billet aluminum components
• Striking race-inspired appearance
• Built for on-road stability and off-road control

Push Your HD Truck Farther With More Control

If you're ready to upgrade how your 2020-2025 GM 2500HD or 3500HD handles real-world driving, the FOX 2.5 Performance Series Smooth Body IFP HTO Front Shock has what it takes to deliver. This shock doesn’t just improve your ride over potholes and ruts, it completely transforms the way your truck responds under pressure. Whether you're hauling a trailer, rolling down the highway, or taking the long way home through backcountry roads, you’ll feel the added control and comfort right away. The external reservoir adds extra oil and nitrogen capacity, which helps keep things cool and consistent even under tough conditions. It also brings that aggressive, race-ready look to your front end without compromising day-to-day drivability. If you've got a mild lift or run heavier tires, the HTO rebound control keeps the ride smooth when the shocks reach full extension. From daily duty to weekend adventures, this FOX setup helps you drive with more confidence in every mile.

Designed To Deliver Race Inspired Suspension Performance

Built for serious drivers and engineered for modern heavy-duty platforms, the FOX 987-24-008 front shock offers premium-level suspension technology in a package made to last. At its core is a 2.5-inch seamless steel body that’s zinc plated to resist corrosion and designed to shed heat under demanding loads. Inside, FOX uses a race-developed high-flow piston paired with an Internal Floating Piston (IFP) reservoir to separate oil and gas, reducing fade and keeping damping performance predictable. A 7/8-inch hard chrome-plated shaft delivers strength and durability for long-term use, while the black-anodized billet aluminum components ensure precision at every corner. The Dual Speed Compression (DSC) adjuster lets you fine-tune compression settings, giving you complete control over how your suspension reacts on the fly. It also includes a redundant sealing system to keep out dirt and moisture in harsh environments. Whether your truck is stock or has a small lift, this FOX shock delivers advanced damping technology for the best balance of comfort, stability, and off-road capability.

Fits: 2020, 2021, 2022, 2023, 2024, 2025 GM 2500HD/3500HD

Notes:

• Sold individually; purchase two for full front replacement
• Designed for 2020–2025 GM 2500HD/3500HD with 0–1" front lift
• Hydraulic Top Out (HTO) technology reduces harsh top-outs
• Ideal for trucks with heavier, aggressive tires
• Fully rebuildable and re-tunable for long-term use
• Vehicle-specific valving ensures optimal performance
• Bar pin top and clevis bottom mounts; verify compatibility
• Provides 4.38 inches of shock travel
• Internal Floating Piston (IFP) separates oil and gas
• Type II anodized aluminum body resists corrosion
• High-flow design enhances shock responsiveness
• Installation requires standard hand tools; no drilling needed

Install Instructions