Fox 2.5 Performance IFP HTO Front & Rear Shock Kit | 2020-2026 Chevy/GMC 2500HD/3500HD 2WD/4WD | 4-6 in Lift
$1,387.80
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Fox 2.5 Performance IFP HTO Front & Rear Shock Kit | 2020-2026 Chevy/GMC 2500HD/3500HD 2WD/4WD | 4-6 in Lift
$1,387.80
Free shipping over $200. Lower 48, no code needed. 30-day returns.
Good to know before you buy
Fits
- 2020-2026 Chevy Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD, 2WD and 4WD, with a 4 to 6 in lift kit (4 to 6 in front, 4 to 6 in rear)
Does not fit: stock or leveled trucks, trucks lifted 3.5 in or less, trucks lifted 7 in or more
Why this kit
The step up from the Fox 2.0 for a current GM HD on a 4 to 6 in drop-bracket lift, without going to a remote reservoir. The 2.5 Performance Series IFP HTO uses a 2.5 in body with a larger piston and much more oil, so it runs cooler and holds its damping longer on a heavy truck than a 2.0 can, while staying a simple bolt-in. Two 987-24-033 fronts and two 987-24-035 rears, both sized for 4 to 6 in of lift, so a tall L5P on 35s or 37s stops wallowing over dips and keeps its composure on washboard with a trailer on. FOX does not list a 2.0 IFP 4-6 in front for the 2020+ HD, so this is also the only FOX set for that truck at this height.
At a glance
| Kit contents | 2 front shocks + 2 rear shocks (one complete truck) |
|---|---|
| Front | Fox 2.5 Performance IFP HTO 987-24-033, for 4 to 6 in front lift |
| Rear | Fox 2.5 Performance IFP HTO 987-24-035, for 4 to 6 in rear lift |
| Design | 2.5 in aluminum body, internal floating piston, high-temp oil, 7/8 in hard chrome shaft |
| Drivetrain | 2WD and 4WD |
| Warranty | FOX limited lifetime warranty (Performance Series purchased after 3/30/2025) |
What is in the box
- 2 x Fox 2.5 Performance Series IFP HTO front shock, part number 987-24-033
- 2 x Fox 2.5 Performance Series IFP HTO rear shock, part number 987-24-035
- Bushings, washers and hardware. Factory or lift kit mounting bolts are reused
Questions
Will the fronts clear my lift kit's brackets?
The 2.5 body is a half inch larger in diameter than the 2.0. FOX lists it for the common 4-6 in GM HD drop-bracket kits; if your kit uses a tight-fitting front shock bracket, check clearance around the lower mount before ordering.
My lift kit came with shocks. Why swap?
Most 4-6 in GM HD kits ship with nitro-charged twin-tubes as the base option. The FOX 2.5 uses the same mounts and holds its damping on washboard and under a trailer where a twin-tube fades.
How long does installation take?
Rears are 20 to 30 minutes per side with hand tools. Fronts are a bolt-in swap at the lift kit's lower mount and the frame, about 30 to 45 minutes per side.
What is the warranty?
FOX covers 2.0 and 2.5 Performance Series IFP shocks purchased after 3/30/2025 with a limited lifetime warranty against defects, to the original retail owner through the original place of purchase. Keep your Hannah Suspension order confirmation.
About FOX
FOX Factory has built racing and off-road dampers since 1974 and supplies factory shocks for the Ford Raptor, Ram TRX and Chevy ZR2. The Performance Series brings that race-developed piston and valving to a bolt-on truck shock. Hannah Suspension ships genuine FOX parts with full factory warranty.