Serious off-road capability and an aggressive lifted stance come together in Rough Country's 6-Inch Coilover Conversion Radius Arm Lift Kit for the 2023-2026 4WD F-250 and F-350 Super Duty. The kit adds six inches of lift through a complete front coilover conversion paired with tubular radius arms, a dual-shock front setup, and heavy-duty rear lift blocks, giving your fifth-gen Super Duty the clearance to run up to 37-inch tires while maintaining composed, controlled handling on and off the road.
Vertex coilovers with external reservoirs. The 2.5-inch nitrogen-charged monotube Vertex coilovers feature fully adjustable ride height and external reservoirs that deliver 56% more fluid capacity than a standard shock body. Greater fluid volume keeps operating temperatures lower and damping performance consistent during extended off-road runs or loaded highway miles. A secondary V2 monotube shock at each front corner rounds out the dual-shock setup, adding stability and damping control that a single shock cannot provide.
Tubular radius arms engineered for the OEM mounting points. The fabricated tubular radius arms use a 2-inch outer diameter and bolt directly into factory mounts without modification. Their geometry maintains a factory-like suspension angle and corrects caster so steering feel stays predictable at the new ride height. Durable rubber bushings dampen road noise and absorb vibration throughout the arm, keeping the cabin quieter than setups built around spherical bearings.
Heavy-duty fabricated coilover mounts. Quarter-inch fabricated steel coilover mounts replace the stock perches and handle the added load of the Vertex coilover and dual-shock configuration. Top-mounted reservoir brackets position the external reservoirs cleanly and securely, keeping the engine bay organized after installation.
Rear lift blocks built to eliminate axle wrap. Fabricated rear lift blocks outperform cast alternatives in strength and provide anti-axle-wrap geometry that preserves factory ride quality under load and acceleration. For a complete four-corner performance package, the kit accommodates optional V2 or Vertex rear shocks.
Front-to-rear leveling with a fully bolt-on installation. The system corrects factory rake so the truck sits level from front to rear, giving it a more purposeful stance before accessories are added. No cutting or drilling is required at any point in the installation.
Product Benefits
- Six Inches of Lift: Adds clearance to accommodate tires up to 37 inches.
- Vertex Coilovers: Adjustable 2.5-inch nitrogen-charged monotube design with external reservoirs for cooler, more consistent damping.
- Dual Front Shock Setup: Secondary V2 monotube shock at each front corner improves stability and control.
- Tubular Radius Arms: Two-inch outer diameter arms bolt to OEM mounts and correct caster at the new ride height.
- Quarter-Inch Coilover Mounts: Fabricated steel mounts handle the full load of the coilover conversion.
- Anti-Axle Wrap Rear Blocks: Fabricated lift blocks eliminate axle movement without compromising ride quality.
- Front-to-Rear Leveling: Corrects factory rake for a balanced, aggressive stance.
- Fully Bolt-On: No cutting or drilling required for installation.
- Optional Rear Shocks: Compatible with V2 or Vertex rear shocks for a four-corner performance upgrade.
- Limited Lifetime Replacement Warranty: Covered by Rough Country's lifetime warranty.
Note: Fits Diesel models only. Does not fit models equipped with a gas engine due to variances in motor weight. Does not fit models equipped with the Tremor Off-Road Package, as those trucks carry approximately a 1.5-inch factory lift. Does not fit dually models. To ensure proper functionality of your Advanced Drive Assistance System (ADAS) and Light Detection and Ranging (LiDar) systems, recalibration may be necessary to retain proper functionality of these features.
About Rough Country: Rough Country designs and manufactures lift kits, leveling kits, suspension components, and accessories focused on off-road capable trucks and SUVs. The brand builds its products around bolt-on installation, broad vehicle coverage, and a limited lifetime replacement warranty that backs the entire catalog.
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Product Specifications & Vehicle Fitment
Review the product details and confirm compatibility with your vehicle before ordering.
| Specification | Details |
|---|---|
| Vehicle Fitment | 2023, 2024, 2025, 2026 |
