FOX 2.5 Performance Series HTO Rear Shock — Ford F-250/F-350 Super Duty SKU: 987-24-001

Overview

This is a FOX 2.5 Performance Series HTO (Hydraulic Top Out) bolt-on rear shock for the Ford F-250/F-350 Super Duty — a 2.5" internal floating piston (IFP) design with position-sensitive rebound damping, vehicle-specific valving, and a Type II clear-anodized aluminum body, rated for a 0"–1.5" lift. Exact fitment and drivetrain coverage vary by model year and trim — verify your exact configuration against the table below before ordering.

Before ordering: This is a rear-position shock only — it does not include a front shock. Rated for a 0"–1.5" lift across all verified applications. Fitment and drivetrain coverage vary by exact model year and trim, especially on the F-350; consult the Verified Fitment table rather than assuming universal fit across all Super Duty years. F-350 Limited trim is not covered for the 2017, 2025, or 2026 model years.

Required separately: Manufacturer-specified installation hardware, tools, and a professional installation are recommended; this listing does not include installation instructions or hardware beyond the shock itself. Confirm whether a matching front shock is needed for your build — it is not included with this SKU.

Verified Fitment

Ford F-250 Super Duty

Ford F-350 Super Duty

F-350 Limited is not listed for 2017, 2025, or 2026 — no verified fitment for this SKU on those model-year/trim combinations.

Component Specifications

What Is and Is NOT Included

Included:

• One FOX 2.5 Performance Series HTO rear shock, part number 987-24-001

Not included:

• Front shock (not part of this SKU; confirm separately if needed for your build)
• Installation hardware and tools
• Professional installation or alignment services

Critical Compatibility

• Rear position only: This SKU is a rear shock. It does not include or substitute for a front shock.
• Lift height: Rated for a 0"–1.5" lift across all verified applications.
• Bolt-on installation: Described by the manufacturer as a bolt-on shock; confirm this matches your intended installation approach.
• F-350 Limited exclusion: Not covered for 2017, 2025, or 2026 model years — no verified fitment exists for this SKU on those combinations.
• Drivetrain varies by year and trim: Most F-350 trims (Lariat, XL, XLT) are 4WD-specific across all covered years. King Ranch and Platinum are 4WD-only through 2022, then broaden to "All" drivetrains from 2023 onward. F-350 Limited and most 2025 F-250 trims are listed as "All" drivetrain. Confirm your specific truck's drivetrain against the table.
• HTO benefit: Hydraulic Top Out technology is described as particularly beneficial after installing heavier, more aggressive tires, or on applications lifted higher than OEM specification.

Installation Notes

No manufacturer installation instructions were supplied for this task. Professional installation is recommended for suspension components. Follow current FOX installation documentation for this exact part number, including torque specifications and any required hardware, before installation.

The Obsidian Take

This FOX 987-24-001 2.5 Performance Series HTO rear shock is a rear-position shock for the Ford F-250/F-350 Super Duty, uniformly rated for a 0"–1.5" lift. The Hydraulic Top Out piston adds position-sensitive rebound control that's particularly useful for heavier tires or lifted applications. The main thing to confirm before ordering is your exact year, trim, and drivetrain against the Verified Fitment table, since coverage on the F-350 varies by trim and year, and the Limited trim has specific year gaps.

This Product Is For You If

• You own a Ford F-250 or F-350 Super Duty whose exact year, trim, and drivetrain combination appears in the Verified Fitment table.
• Your target lift is within the 0"–1.5" range.
• You are running heavier or more aggressive tires, or a lift near or above OEM specification, and want the HTO rebound benefit.
• You are replacing or upgrading the rear shock specifically, not the front.

This Product Is Not For You If

• You need a front shock — this SKU is rear position only.
• You own a 2017, 2025, or 2026 F-350 Limited — this SKU has no verified fitment for those combinations.
• Your target lift exceeds 1.5".
• You have not confirmed your truck's drivetrain against the table, where coverage varies by year and trim.

Product Family Reference

For the front-position 2.0 Performance Series shock covering this same Ford F-250/F-350 Super Duty range, see FOX 985-24-154 or 985-24-151.

Common Questions

Is this a front or rear shock?
Rear only. It does not include or substitute for a front shock.

What does HTO mean and why does it matter?
Hydraulic Top Out. It provides position-sensitive rebound damping that reduces harsh top-outs and improves comfort, particularly after installing heavier, more aggressive tires or on lifted applications.

Does this fit the F-350 Limited?
Only for 2018–2024. There is no verified fitment for this SKU on the 2017, 2025, or 2026 F-350 Limited.

What lift height is this shock rated for?
0" to 1.5".

What is the warranty?
FOX provides a Limited Lifetime Warranty on 2.0/2.5 Performance Series shocks purchased after 3/30/2025 (excluding sports car shocks and 2.0 Performance Series remote-reservoir shocks). See full warranty terms below.

Manufacturer Data Disclaimer

Fitment and specification data for this product are sourced from FOX Factory manufacturer fitment data and product documentation supplied for this exact part number, current as of publication. Specifications and fitment are subject to change without notice; confirm current documentation for this SKU at the time of purchase.

Required Legal, Warning, Fitment, and Return Notices

Warranty Summary: FOX Factory, Inc. warrants, to the original retail owner of each new FOX 2.0/2.5 Performance Series suspension product purchased after 3/30/2025 (excluding sports car shocks and 2.0 Performance Series remote-reservoir shocks), that the product is free from defects in materials and workmanship under normal use on the vehicle application it was designed for. This warranty covers factory defects in material and workmanship other than finish and coatings. For products not meeting the post-3/30/2025 purchase condition, FOX's standard Limited One (1) Year Warranty on suspension products applies instead, running from the date of original retail purchase from an authorized FOX dealer.

This warranty is conditioned on normal operation and proper maintenance as specified by FOX; is non-transferable and applies only to the original retail owner; and is void if the product is subjected to abuse, neglect, unauthorized repair or service, alteration, modification, accident, or other abnormal or improper use. FOX is not liable for removal, installation, or reinstallation costs, including labor. If FOX determines a product is covered, it will be repaired or replaced with a comparable model at FOX's sole discretion — this is the exclusive remedy, and incidental, consequential, or punitive damages are excluded. Normal wear and tear, and failures from abuse, improper assembly, neglect, alteration, improper maintenance, crash, misuse, or collision are not covered. This warranty gives specific legal rights, which may vary by state or country.