Description
The FOX® 987-24-020 2.5 Performance Series Front IFP HTO Shock is a bolt-on front shock for 2017-2026 Ford F-250 and F-350 Super Duty 4WD trucks running a 6-7 inch front lift, delivering 9.29 inches of travel through a 2.5-inch smooth body design.
IMPORTANT: This shock is valved specifically for 2017-2019 trucks running a 6-inch front lift, 2020-and-newer non-Tremor trucks running a 7-inch front lift, or Tremor trucks running a 5-inch front lift. It is sold individually. For 2005-2019 (8-inch lift) or 2020-2026 non-Tremor (9-inch lift) / Tremor (7-inch lift) applications, the correct front shock is FOX® 987-24-022, not this part number. Installing the wrong lift-height variant will result in incorrect ride height and damping performance.
FOX® 2.5 Performance Series HTO shocks are bolt-on units built with position-sensitive technology, vehicle-specific valving, and larger pistons to improve on- and off-road performance over stock shocks. The 2.5-inch shock body is impact-extruded from 6061-T6 aluminum and features Type II clear-anodized plating that efficiently dissipates heat and resists corrosion.
An internal floating piston (IFP) separates the shock oil from the high-pressure nitrogen charge inside the shock body, keeping damping performance consistent and preventing oil aeration under hard use. High-flow, velocity-sensitive damping is tuned specifically for this application.
Hydraulic Top Out (HTO) technology adds usable, position-sensitive rebound damping control both on and off the pavement. HTO reduces harsh top-outs and increases ride comfort by forcing shock oil through a secondary shim stack to slow shaft speed near full extension — particularly beneficial after installing heavier, aggressive tires or when lifted higher than OEM specification.
The shock uses a 5/8-inch hard chrome-plated shaft, a stem-top upper mount, and an eyelet lower mount. FOX® backs this shock with a Limited Lifetime Warranty.
- Fits 2017-2026 Ford F-250 and F-350 Super Duty 4WD trucks running a 6-7 inch front lift (2017-2019: 6″; 2020+ non-Tremor: 7″; Tremor: 5″)
- 2.5″ impact-extruded 6061-T6 aluminum shock body with Type II clear-anodized plating
- Internal Floating Piston (IFP) separates shock oil from nitrogen charge
- Hydraulic Top Out (HTO) piston for position-sensitive rebound control
- High-flow, velocity-sensitive, application-specific damping
- 5/8″ hard chrome-plated shaft
- No reservoir, no external compression adjuster — direct bolt-on installation
- FOX® Limited Lifetime Warranty
- Sold individually
| Part Number | 987-24-020 |
| Position | Front |
| Series | Performance |
| Body Diameter | 2.5″ |
| Travel | 9.29″ |
| Extended Length | 26.29″ |
| Compressed Length | 17″ |
| Top Mount | Stem Top |
| Bottom Mount | Eyelet |
| Shaft | 5/8″ hard chrome-plated |
| Piston Technology | Internal Floating Piston (IFP), Hydraulic Top Out (HTO) |
| Body Material | Impact-extruded 6061-T6 aluminum, Type II clear-anodized |
| Warranty | Limited Lifetime |
| Quantity | Sold individually |
This shock is designed for 2017-2026 Ford F-250 and F-350 Super Duty 4WD trucks (F-350 King Ranch, Lariat, Limited, Platinum, XL, and XLT trims; F-350 Limited coverage begins with the 2018 model year) running a 6-7 inch front lift as detailed above. This is a front, lift-height-specific application — confirm your exact lift height and Tremor/non-Tremor configuration before ordering, and do not substitute this part number for 987-24-022, which covers the same trucks at a taller 8-9 inch front lift.