6-Inch Vertex Coilover Lift Kit for 2017–2022 Ford Super Duty 4WD
- Fits 2017–2022 Ford F-250 and F-350 Super Duty 4WD, XL through Limited — diesel only
- Not for gas engines, manual shift transfer cases, dually axles, or Tremor Factory Trim Package trucks
- Vertex 2.5 adjustable front coilovers (left and right) plus two Vertex 2.5 rear shocks
- Includes two radius arm upgrade boxes, radius arm kit, and transfer case clocking kit
- Fabricated 4.5-inch rear block with U-bolts replaces the factory block
- 10-speed transmission trucks: dial pin must come out. Downloadable installation guide available
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 Coilover Lift Kit, fitment-checked
Rough Country 55659 is a 6-inch lift kit for the 2017–2022 Ford F-250 and F-350 Super Duty 4WD, built around adjustable Vertex 2.5 front coilovers and a pair of Vertex 2.5 rear shocks. Diesel drivetrains only: gas engines, manual shift transfer cases, dually axles, and the Tremor Factory Trim Package are all outside the fitment.
Two radius arm upgrade boxes set this 6-inch lift kit for the 2017–2022 Ford Super Duty 4WD apart from a plain spacer package — they ride alongside adjustable left and right Vertex 2.5 front coilovers, Vertex 2.5 rear shocks, a radius arm kit, and a transfer case clocking kit. At the rear, a fabricated 4.5-inch block and U-bolt set takes over from the factory block, with anti-axle-wrap geometry meant to hold factory ride manners. Trucks with the 10-speed transmission need the dial pin pulled during the job. Shipping weight: 326 lb.
What’s in the box
Kit contents
- 1× Transfer Case Clocking Kit 55003
- 2× Vertex 2.5 RR 6 In 695805
- 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 55659 kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 55659 |
| UPC / GTIN | 00840269914898 |
| Lift height | 6 in |
| Shock package | Vertex series |
| Shipping weight | 326 lb |
| Country of origin | TH |
| Category | Suspension & Lift Kits › Lift Kits |
| Installation guide | Downloadable PDF |
Why buy here