Rough Country's 4.5-inch Radius Arm Lift Kit transforms the fifth-generation F-250 and F-350 Super Duty diesel into an aggressive, capable machine without requiring cutting, drilling, or custom fabrication. The kit eliminates factory rake, raises ground clearance, and delivers a level front-to-rear stance through a bolt-on system engineered specifically for 2023-2026 diesel-powered, 4WD Super Duty trucks.
Tubular radius arms built for real-world strength. High-clearance tubular radius arms with a 2-inch outer diameter replace the factory units and bolt directly into OEM mounts. The geometry maintains more factory-like suspension angles, and the oversized design handles the added stress of lifted suspension without flex or fatigue that stock arms develop under load.
Lifted coil springs with proper geometry support. Front coil springs raise the stance while sway bar drop brackets and a track bar relocation bracket keep alignment predictable. These components work together to preserve handling characteristics across pavement and trail surfaces, rather than just stacking height without accounting for the resulting geometry changes.
Heavy-duty fabricated rear blocks with anti-wrap design. Fabricated rear blocks outperform standard cast blocks in both strength and longevity. Anti-axle wrap blocks control axle movement under torque, which matters especially on diesel-powered trucks where rotational force can cause unwanted wheel hop or axle shift under hard acceleration.
Configurable shock options match your driving priorities. The kit ships with a choice of shock absorbers: nitrogen-charged N3 shocks for a balanced blend of street comfort and trail performance, or V2 monotube shocks for improved heat dissipation and responsiveness during sustained off-road use. Both options are designed to work with the lifted coil spring setup.
Up to 35-inch tire fitment. With proper wheel backspacing, this kit clears tires up to 35 inches, opening the door to aggressive off-road rubber without requiring additional trimming or fender modification.
Product Benefits
- Bolt-On Installation: No cutting or drilling required; all components fit into factory mounting locations.
- 4.5-Inch Lift: Adds front-to-rear leveling and increased ground clearance over the factory stance.
- Tubular Radius Arms: 2-inch outer diameter arms replace stock units and mount to OEM locations.
- Improved Suspension Geometry: Sway bar drop brackets and track bar relocation bracket maintain proper angles at ride height.
- Fabricated Rear Blocks: Stronger construction than cast blocks with anti-axle wrap design for load stability.
- Configurable Shocks: Choose N3, V2 monotube, or M1 monotube shocks to match your preferred ride character.
- Up to 35-Inch Tire Clearance: Fits larger aggressive tires with proper wheel backspacing.
- Durable Rubber Bushings: Absorb vibration and reduce noise across the radius arm assemblies.
- Limited Lifetime Warranty: Backed by Rough Country's standard coverage.
Note: Fits 2023-2026 4WD F-250 and F-350 Super Duty diesel models only. Does not fit gas engine models due to variances in motor weight. Does not fit models equipped with the Tremor Off-Road Package, which includes 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 suspension lift kits, leveling kits, and off-road accessories for trucks and SUVs. The brand focuses on accessible pricing, bolt-on fitment, and broad vehicle coverage, with a product line that spans daily drivers to dedicated trail rigs.
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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 |
