Fox 2.5 Performance IFP HTO Front & Rear Shock Kit | 2011-2019 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 | 2011-2019 Chevy/GMC 2500HD/3500HD 2WD/4WD | 4-6 in Lift
$1,387.80
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Good to know before you buy
Fits
- 2011-2019 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 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 987-24-032 fronts and two 987-24-035 rears, both sized for 4 to 6 in of lift, so a tall Duramax on 35s or 37s stops wallowing over dips and keeps its composure on washboard with a trailer on.
At a glance
| Kit contents | 2 front shocks + 2 rear shocks (one complete truck) |
|---|---|
| Front | Fox 2.5 Performance IFP HTO 987-24-032, 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 987-24-032
- 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
2.5 HTO or 2.0 IFP?
Same FOX valving philosophy. The 2.5 has a larger body and piston and roughly 50 percent more oil, so it fades less on long rough roads and under heavy loads. If the truck is a daily driver that occasionally tows, the 2.0 4-6 in kit is the value pick. If it works hard every week or sees real dirt, the 2.5.
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.
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.