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Home / Suspension & Lift Kits / Lift Kits / Rough Country 43851
6-Inch Super Duty Lift Kit, Vertex Coilovers, 6.5-In Blocks, Rough Country 43851
Rough CountryPart 43851 · UPC 00840269935367

6-Inch Super Duty Lift Kit, Vertex Coilovers, 6.5-In Blocks

$3,399.95MAP price

Free shipping · 30-day returns

In stock: 26 available
Shipping weight: 277.35 lb.
  • Ford F-250 and F-350 Super Duty 2023-2025, 4WD
  • Vertex Coilovers and a 6-inch coil box
  • 6.5-Inch Blocks block and U-bolt set
  • Supplied without the universal U-bolt kit
  • Does NOT fit gas engine models or manual shift transfer cases
  • Does NOT fit dually models or the Tremor Factory Trim Package
📄 Download the installation guide (PDF)

Will it fit your truck?

✓ Fits

2023–2025 Ford F-250 Super Duty · 4WD
King RanchLariatLimitedPlatinumXLXLT
2023–2025 Ford F-350 Super Duty · 4WD
King RanchLariatLimitedPlatinumXLXLT

✕ Does not fit

  • Gas engine models
  • Manual shift transfer cases
  • Dually models

Models equipped with a 10-speed transmission must remove dial pin. Does NOT work on models equipped with Tremor Factory Trim Package. Fitment on this page is based on the manufacturer’s application data.

More for your truck

Ford F-250 Super Duty lift kits366

6-Inch Super Duty Lift Kit, Vertex Coilovers, 6.5-In Blocks, fitment-checked

One of Rough Country's 6-inch Super Duty kits, and the kit contents are what separate them: this one carries Vertex 2.5 adjustable coilovers with the 6.5-inch block and U-bolt set listed with overloads. Vehicle coverage and exclusions are common to the whole group.

Adjustable damping on the taller block. Four Vertex 2.5 coilovers (two front, two rear, each specified for 6 inches) go in alongside the 6.5-inch block and U-bolt set listed with overloads. The coilovers account for most of the weight difference against the fixed-damper builds. A 6-inch coil box and a front CV drive shaft complete the kit. Shipping weight: 277.35 lb.

Kit contents

  • 1× 6 Inch Coil Box 9296
  • 1× 6.5 In Block U-Bolt Kitoverloads 1550BOX2
  • 1× Kit Box 43700992
  • 1× CV Drive Shaft 5068.1$749.95
  • 2× Vertex 2.5 FR 6 In 685754
  • 2× Vertex 2.5 RR 6 In 695805

Priced components are sold separately here, so a worn shock or arm can be replaced on its own later.

Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 43851 kit fits the vehicles shown in the fitment section above.

Specifications

BrandRough Country
Part number43851
UPC / GTIN00840269935367
Shock packageVertex series
Shipping weight277.35 lb
Country of originTH
CategorySuspension & Lift Kits › Lift Kits

Why buy here

Manufacturer-listed exclusions shown. We publish what a part does not fit, before you buy, not after the return.
Sourced from the application data. Fitment on this page comes from the manufacturer’s application catalog, not a copied listing.
Real install docs. The actual step-by-step guide, linked right on the page.

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