See what we have for your vehicle: 2023 GMC Sierra 2500 HD 2WD LT275/70-18 (See Products/New Search)

Vehicle in session - 2023 GMC Sierra 2500 HD 2WD LT275/70-18 Summit White

FOX  2.5 Performance Series IFP HTO Shock

Premium, Performance Street
Front
$ 346.95 Each
Special Order How soon can I get this?
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-024
Note: Front fitment. 2.5 Performance Series HTO. Fits 6.5" lift. For use with raised torsion systems that require lower eyelet mounting. WILL NOT FIT OE MOUNTS.
Front
$ 346.95 Each
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-008
Note: Front fitment. Fits 0-1" lift. 2.5 Performance Series HTO
Front
$ 346.95 Each
Special Order How soon can I get this?
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-033
Note: Front fitment. 2.5 Performance Series HTO. Fits 4"-6" lift. NOT for use with lift kits that change OE mounts.
Front
$ 346.95 Each
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-010
Note: Front fitment. Fits 1.5"-2.5" lift. 2.5 Performance Series HTO
Rear
$ 346.95 Each
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-009
Note: Rear fitment. Fits 0-1" lift. 2.5 Performance Series HTO
Rear
$ 346.95 Each
Special Order How soon can I get this?
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-035
Note: Rear fitment. Fits 4"-6" lift. 2.5 Performance Series HTO
Rear
$ 346.95 Each
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-011
Note: Rear fitment. Fits 1.5"-2.5" lift. 2.5 Performance Series HTO
Rear
$ 346.95 Each
Special Order How soon can I get this?
  • Housing: Shock Housing
  • Manufacturer Part #: 987-24-025
Note: Rear fitment. Fits 6.5" lift. 2.5 Performance Series HTO

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FOX's 2.5 Performance Series IFP HTO smooth body shocks deliver a more comfortable driving experience for drivers going off-road. The 2.5" CNC-machined Type II anodized aluminum shock body features an Internal Floating Piston (IFP) to separate the shock oil from the high-pressure nitrogen, helping to dissipate heat and optimize damping.

These bolt-on shocks also come with Hydraulic Top Out (HTO) technology to increase the position-sensitive damping force, allowing drivers to maintain control against harsh top-outs when driving off pavement. Drivers who utilize heavier, more aggressive tires on their vehicle can experience increased damping force and comfort with each ride using these smooth body shocks.

Features & Benefits:

  • 2.5" CNC-machined Type II anodized aluminum shock body resists corrosion and dissipates heat.
  • Hydraulic Top Out (HTO) position-sensitive damping technology maximizes control through any terrain
  • Vehicle-specific valving to maximize performance
  • Internal Floating Piston (IFP) separates shock oil from high-pressure nitrogen to optimize damping

⚠ Warning Icon WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Ratings Charts & Reviews FOX 2.5 Performance Series IFP HTO Shock

Consumer Surveys

This suspension product hasn't received enough consumer feedback to be rated.

Consumer Reviews

  • May 02, 2026

    (Verified Purchase)

    2.5 out of 5

    Ride quality is pretty much same as stock. It’s a good direct replacement rather than spending more for the factory tremor shocks.

    • Vehicle: 2021 Ford F250 4WD Tremor Off-Road, 285/75-18 OE

    • Vehicle Miles: 74,000

    • Miles Driven on Product: 12,000

    • Driving Style: Average

    • Driving Conditions: Combined Highway/City

    • Shocks: FOX 2.5 Performance Series IFP HTO Shock

    • Spring: N/A

    • Chassis Products: N/A

    • Coil-Over: N/A

    • Location: OAKLAND, MI

    Was this review helpful?

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  • February 17, 2026

    (Verified Purchase)

    4.5 out of 5

    All things considered this is a good product. The truck is a 3500 so ride is going to be a little stiff. Everyone at tire rack did a great job helping me. Thank you

    • Vehicle: 2020 GMC Sierra 3500 HD 4WD Single Rear Wheel

    • Vehicle Miles: 117,000

    • Miles Driven on Product: 50

    • Driving Style: Average

    • Driving Conditions: Combined Highway/City

    • Shocks: FOX 2.5 Performance Series IFP HTO Shock

    • Spring: N/A

    • Chassis Products: N/A

    • Coil-Over: N/A

    • Location: ELVERTA, CA

    Was this review helpful?

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