Fox 2.5 Performance Series Rear IFP HTO Shock | 2017-2026 Ford F-250/F-350 Super Duty 2WD/4WD | 0-1.5 in Lift | 987-24-001
$359.95
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Fox 2.5 Performance Series Rear IFP HTO Shock | 2017-2026 Ford F-250/F-350 Super Duty 2WD/4WD | 0-1.5 in Lift | 987-24-001
$359.95
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Good to know before you buy
Fits
- 2017-2026 Ford F-250/F-350 Super Duty 2WD/4WD
Does not fit: Tremor, Factory lift packages
Why the FOX 2.5 Performance Series
Trucks that work and tow, where the 2.5 in body (23% more surface area than a 2.0) resists fade under load and HTO tames harsh top-outs on rough roads. This rear IFP HTO shock is valved and sized by FOX for the 2017-2026 Ford F-250/F-350 Super Duty 2WD/4WD running 0 to 1.5 in of lift. The larger body and reservoir carry more oil, so damping stays consistent when the truck is loaded or the trail gets long. HTO adds a secondary shim stack that slows the shaft near full extension, so the axle does not bang the top of its travel over dips and whoops. FOX shocks are fully rebuildable and re-valvable, so this is the last IFP HTO shock the truck needs.
At a glance
| Position | Rear |
|---|---|
| Quantity | One shock |
| Body diameter | 2.5 in |
| Shaft | 7/8 in hard chrome plated |
| Architecture | Monotube, internal floating piston (IFP), Hydraulic Top Out (HTO) position-sensitive rebound |
| Adjustment | None (factory tuned for this vehicle) |
| Lift range | For 0 to 1.5 in lift |
| Warranty | Limited lifetime warranty (FOX 2.0 and 2.5 Performance Series purchased after 3/30/2025) |
What is in the box
- One shock with FOX mounting hardware where the application requires it
- FOX installation instructions (also at tech.ridefox.com)
Manufacturer part number 987-24-001. Designed and built by FOX Factory.
Questions
Is this a lift?
No. It is a shock built for the lift range shown. Match the lift range to your leveling or lift kit; a shock that is too short limits droop and a shock that is too long can bottom internally.
Do I need to buy two?
This part number is one shock. Order two for a complete axle, or check our matching front or rear shock for the same lift range.
Is it rebuildable?
Yes. Every FOX truck shock can be rebuilt, re-charged and re-valved by FOX Factory or an authorized service center, so it does not become a throwaway part when the seals wear.
What is HTO?
Hydraulic Top Out. Near full extension the shock oil is forced through a second shim stack that slows the shaft, so the suspension unloads smoothly over dips instead of topping out with a bang. It is position sensitive and needs no adjustment.
What is the warranty?
Limited lifetime warranty (FOX 2.0 and 2.5 Performance Series purchased after 3/30/2025). Warranty is to the original retail purchaser through the place of purchase; keep your Hannah Suspension order confirmation.
FOX truck shock lines
| Line | Body | Architecture | Adjuster | Warranty |
|---|---|---|---|---|
| 2.0 Performance Series | 2.0 in | IFP or remote reservoir | None (CD on select R/R) | Lifetime (IFP) / 1 yr (R/R) |
| 2.5 Performance Series | 2.5 in | IFP, HTO on select | None | Lifetime |
| 2.5 Performance Elite | 2.5 in | Reservoir | DSC dual speed | 1 year |
| 2.5 Factory Series | 2.5 in | Reservoir | DSC where fitted | 1 year |
| 3.0 Factory Race / Series | 3.0 in | Reservoir, internal bypass | None | 1 year |
| 3.2 Factory Race Live Valve | 3.2 in | Reservoir, Live Valve | Electronic | 1 year |
About FOX
FOX Factory has built race-winning dampers since 1974 and supplies factory suspension to Ford, Ram, GM and Toyota off-road trims. Every FOX truck shock is aluminum-bodied, fully serviceable and tuned for the specific vehicle. Limited lifetime warranty (FOX 2.0 and 2.5 Performance Series purchased after 3/30/2025). Hannah Suspension ships genuine FOX parts with full factory warranty; keep your order confirmation, FOX warranties run to the original purchaser.