FOX 2.5 Performance Smooth Body HTO 4-6″ Front Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD

Description
FOX 2.5 Performance Smooth Body HTO 4-6″ Front Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD

FOX 2.5 Performance Smooth Body HTO 4-6 inches Front Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD

Part Number: 987-24-033

Summary: The FOX 2.5 Performance Series HTO shocks are engineered to provide high-capacity damping for the GMC Sierra 3500HD. These shocks feature an Internal Floating Piston (IFP) and Hydraulic Top Out (HTO) technology to manage the increased demands of vehicles with 4-6 inches of front lift. By utilizing position-sensitive rebound control and vehicle-specific valving, these shocks resolve harsh top-out issues often associated with heavy wheel and tire combinations, ensuring a controlled ride both on and off the pavement.

Features

• Internal Floating Piston (IFP): The internal floating piston (IFP) design provides separation between the shock oil and high-pressure nitrogen gas to ensure optimized damping and prevent aeration.
• Hydraulic Top Out (HTO): The Hydraulic Top Out (HTO) piston provides position-sensitive rebound damping to ensure reduced harshness during full extension and increased comfort.
• Aluminum Shock Body: The 2.5-inch 6061-T6 aluminum body provides efficient heat dissipation and corrosion resistance to ensure consistent performance under load.
• High-Flow Damping: High-flow velocity-sensitive damping provides application-specific tuning to ensure improved control for lifted heavy-duty applications.

Technical Specifications

Fitment

• 2020-2024 GMC Sierra 3500HD
• Note: Lift: 4-6 inches. Not For Use With Lift Kits That Change OE Mounts.

What’s Included

• Includes 2 Shocks

Why Choose This Product?

• Engineering Advantage: The integration of Hydraulic Top Out (HTO) technology specifically addresses the physics of heavier, aggressive tires by forcing oil through a secondary shim stack to slow shaft speed at the end of the stroke.
• Performance Benefit: Drivers experience a significant reduction in “clunking” or harshness when the suspension reaches full extension, resulting in a more refined ride on high-clearance vehicles.

Frequently Asked Questions

What is the benefit of the HTO technology?
Hydraulic Top Out (HTO) technology reduces harsh top-outs by using a secondary shim stack to slow down shock shaft speed, which is especially helpful for vehicles with heavy tires or high lift heights.

Does this shock work with all lift kits?
These shocks are designed for 4-6 inches of lift but are not for use with lift kits that change the original OE mounting points.

What does the Internal Floating Piston (IFP) do?
The IFP separates the shock oil from the high-pressure nitrogen, which prevents the oil from mixing with the gas and ensures the damping remains consistent and effective.