6-Inch Vertex 2.5 Coilover Lift Kit for Ford Super Duty 4WD
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD in XL, XLT, Lariat, King Ranch, Platinum and Limited trims
- Does not fit gas engines, manual-shift transfer cases, dually models, or the Tremor Factory Trim Package
- Front: left and right adjustable Vertex 2.5 coilovers covering 4.5-6 in, plus radius arm kit and two upgrade boxes
- Rear: V2 monotube shock pair with a 4.5-inch fabricated block and no-overload U-bolt kit replacing the factory block
- 10-speed transmission trucks require dial pin removal; transfer case clocking kit is part of the box
- Downloadable installation guide available for both the kit and coilover steps — shipping weight: 298.0 lb
The Trail Fortress check
Will it fit your truck?
✓ Fits
✕ Does not fit
- Gas engine models
- Manual shift transfer cases
- Dually models
Models equipped with a 10-speed transmission must remove dial pin. New fabricated lift block replaces the factory equipped lift block. Does NOT work on models equipped with Tremor Factory Trim Package. Fitment on this page is based on the manufacturer’s application data.
About this kit
6-Inch Vertex 2.5 Coilover Lift Kit, fitment-checked
Rough Country 55658 lifts the 2017–2022 Ford F-250 and F-350 Super Duty 4WD 6 inches using adjustable Vertex 2.5 front coilovers and a 4.5-inch fabricated rear block with a no-overload U-bolt kit. Diesel, non-dually trucks only: gas engines, manual-shift transfer cases, dually axles and the Tremor Factory Trim Package are not covered.
A 6-inch lift kit for the 2017–2022 Ford F-250 and F-350 Super Duty 4WD, narrowed to diesel, single-rear-wheel trucks — gas engines, manual-shift transfer cases, dually models and the Tremor Factory Trim Package all sit outside its coverage. Front height comes from left- and right-hand adjustable Vertex 2.5 coilovers rated across the 4.5-6 in range, with a V2 monotube shock pair, a radius arm kit plus two radius arm upgrade boxes, and a transfer case clocking kit. At the rear, a 4.5-inch fabricated block and U-bolt kit without overloads takes over from the factory block. Trucks with the 10-speed transmission need the dial pin removed.
What’s in the box
Kit contents
- 1× Transfer Case Clocking Kit 55003
- 1× V2 MONOTUBE SHOCK PAIR 760805-2
- 1× 6" Kit Box 50010991
- 1× 4.5 In Block U-Bolt Kit No Overloads 1563BOX4
- 1× Radius Arm Kit Box 512BOX1
- 1× Vertex 2.5 Adj FR Lh 4.5IN-6.IN 685042L
- 1× Vertex 2.5 Adj FR Rh 4.5IN-6.IN 685042R
- 1× Radius Arm Upgrade Box 53600991A
- 1× Radius Arm Upgrade Box 53600992A
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 55658 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55658 |
| UPC / GTIN | 00840269915109 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 298 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here