ICON 4.5-Inch Stage 4 Suspension System with Radius Arms for 17-19 Ford F250/F350

Built specifically for 2017–2019 Super Duty platforms, this upgrade delivers a measurable 4.5-inch front lift that restores correct driveline geometry while safely clearing 35-inch tires without steering bind or speedometer calibration drift.

• 2.5-Inch Monotube Reservoir Shocks: Nitrogen gas pressure combined with large-volume aluminum chambers eliminates heat-induced damping loss during repeated off-road articulation or loaded highway tow runs.
• Geometrically Calibrated Radius Arms: CNC-milled 6061-T6 housings and chromoly pivot bolts replace stressed OEM cast iron components, correcting factory pinion angles and eradicating violent wheel hop under hard throttle application.
• Progressive Coil & Valve Matching: Custom-ditched springs work in tandem with precision-shot shock valving to handle daily hauling, seasonal firewood runs, and weekend camp trailers without sagging or jarring axle transfer impacts.
• Zero-Cut Bolt-On Compatibility: Included Grade-8 fasteners, pre-installed polyurethane bushings, and aligned relocation tabs mount directly to stock chassis crossmembers, allowing complete installation with standard garage tools and no frame modification.
• Climate-Resistant Structural Finish: Hard-anodized shock bodies and zinc-rich powder coating actively repel road salt, alkaline dust, and UV degradation, maintaining tensile strength across extreme temperature swings and moisture exposure.

Exact Specifications & Warranty Terms

The complete Stage 4 assembly bolts securely to the factory 5-lug hub pattern standard to 17–19 Ford F250 and F350 frames equipped with solid rear suspensions. Front shock outer diameters measure exactly 2.5 inches, featuring fully serviceable external adjustment knobs with 16-click compression and rebound tuning tracks. Radius arms incorporate oversized sealed needle bearings rated for continuous torsion stress, and the entire kit ships dyno-printed with step-by-step torque specifications. Every component is covered by ICON Vehicle Suspension’s limited lifetime warranty against manufacturing defects, improper assembly failure, and accelerated corrosion under rated payload conditions.