Your cart is currently empty!
FOX 2.5 Performance Smooth Body HTO 6.5″ Rear Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD
Description
FOX 2.5 Performance Smooth Body HTO 6.5″ Rear Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD
FOX 2.5 Performance Smooth Body HTO 6.5 inches Rear Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD
Part Number: 987-24-025
Summary: The FOX 2.5 Performance Series HTO shock is a bolt-on solution designed specifically for the GMC Sierra 3500HD. This high-performance shock features position-sensitive technology and vehicle-specific valving to improve both on and off-road handling. By utilizing a larger 2.5-inch anodized aluminum body and Hydraulic Top Out (HTO) technology, these shocks manage heat and control rebound damping effectively, even in applications with significant lift heights and heavier tire configurations.
Features
- Internal Floating Piston (IFP): An internal floating piston (IFP) separates the shock oil from the high-pressure nitrogen to provide optimized damping and consistent performance.
- Hydraulic Top Out (HTO) Technology: A secondary shim stack provides position-sensitive rebound damping control to reduce harsh top-outs and increase driver comfort.
- Anodized Aluminum Body: A 2.5-inch Type II anodized aluminum body provides efficient heat dissipation and corrosion resistance to ensure sustained performance.
- Vehicle-Specific Valving: Custom-tuned valving and larger pistons provide increased damping capacity to ensure a controlled ride on and off the pavement.
Technical Specifications
| Specification | Value |
|---|---|
| Series | Performance |
| Position | Rear |
| Body Diameter | 2.5 inches |
| Collapsed Length | 19.84 inches |
| Extended Length | 31.03 inches |
| Upper Mount | Eyelet |
| Lower Mount | Eyelet |
| Notes | Lift: 6.5 inches |
Fitment
- 2020-2024 GMC Sierra 3500HD
- Note: Lift: 6.5 inches
What’s Included
- Includes 2 Shocks
Why Choose This Product?
- Engineering Advantage: The integration of Hydraulic Top Out (HTO) technology and position-sensitive damping provides advanced control over shock shaft speeds that standard shocks cannot match.
- Performance Benefit: Drivers experience reduced harshness and improved ride comfort, particularly when navigating terrain with vehicles lifted higher than OEM specifications.
Frequently Asked Questions
What is the benefit of HTO technology?
Hydraulic Top Out (HTO) technology uses a secondary shim stack to slow down shock shaft speed, which reduces harsh top-outs and increases comfort.
Are these shocks designed for lifted trucks?
Yes, these shocks are configured specifically for vehicles with a 6.5-inch rear lift height.
How does the IFP design improve performance?
The Internal Floating Piston (IFP) separates the high-pressure nitrogen gas from the shock oil, which prevents aeration and allows for more consistent damping.
Be the first to review “FOX 2.5 Performance Smooth Body HTO 6.5″ Rear Lift IFP Shocks for 2020-2024 GMC Sierra 3500HD”
Questions and answers of the customers
There are no questions yet. Be the first to ask a question about this product.






Reviews
There are no reviews yet.