ICON Stage 4 Suspension System with Radius Arm for 2017-2022 Ford F-250/F-350 4WD 7" Lift

The ICON Vehicle Dynamics Stage 4 Suspension System with Radius Arm delivers a 7-inch lift for 4WD 2017-2022 Ford F-250 and F-350 Super Duty trucks, combining dual-rate coil springs, progressive leaf springs, 2.5 Aluminum Series piggyback reservoir shocks front and rear, a 4-Link kit, adjustable track bar, dual opposing steering stabilizer kit, and fabricated radius arms into a single complete system. Lift height varies by model year and package: 2017-2019 trucks gain 7 inches of front lift; 2020-2022 trucks without the Tremor package gain 7.75 inches; 2020-2022 Tremor-equipped trucks gain 6.75 inches.

Shipping: ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.

Radius Arms Built for Clearance and Caster Control

The fabricated, fully boxed radius arms included in this system use a sealed pivot bushing that reduces road noise and vibration feedback while extending service life. On-vehicle caster adjustment is available through the drop brackets, letting owners dial in steering geometry after the lift without removing the arms. The arm profile is optimized for tire clearance at full steering lock, allowing a 37-inch tall tire to clear without contacting the arm. That clearance is a practical advantage for trucks that see tight trail turns or parking-lot lock-to-lock maneuvers at full lift height.

Shocks Tuned for the Super Duty's Weight and Use

The front and rear 2.5 Aluminum Series piggyback reservoir shocks carry a vehicle-specific valving tune developed for the F-250/F-350's mass and suspension geometry. One-piece impact-extruded aluminum cylinders resist corrosion and maintain a consistent finish over years of exposure. The shocks are fully rebuildable and revalvable, so worn internals or a change in driving style can be addressed without replacing the entire unit. FK Rod End bearings at key pivot points reduce deflection and extend longevity compared to standard rubber bushings.

Springs That Preserve Towing Capacity

ICON-engineered dual-rate coil springs carry a lifetime guarantee against breakage or sag, and the progressive rear leaf springs are designed to improve ride quality without reducing the truck's towing capacity. Front wheel travel increases approximately 50 percent over stock. Both the coil springs and leaf springs in this system are rated for diesel engines only.

Features

• Complete Stage 4 kit: dual-rate coil springs, progressive leaf springs, 4-Link kit, adjustable track bar, dual opposing steering stabilizer, 2.5 VS piggyback shocks front and rear, radius arms, and all installation hardware
• Fabricated radius arms: fully boxed design with sealed pivot bushing, on-vehicle caster adjustment, and optimized tire clearance at full steering lock for up to 37-inch tires
• Rebuildable 2.5 Aluminum Series shocks: impact-extruded aluminum cylinders, vehicle-specific tune, FK Rod End bearings, fully revalvable
• Lifetime guarantees: coil springs carry a lifetime guarantee against breakage or sag; ICON fabricated components carry a lifetime guarantee against breakage or defect
• Approximately 50% more front wheel travel over stock
• OEM wheels and tires compatible with this system

Specifications

Who This Is For and Isn't

This system suits 4WD 2017-2022 Ford F-250 and F-350 Super Duty owners running diesel engines who want a complete, high-travel 7-inch lift with improved off-road performance and the ability to run 37-inch tires without radius arm contact at full steering lock. It is appropriate for towing, job-site use, and off-road driving.

This system is not compatible with 2WD Super Duty configurations. The coil springs and leaf springs are rated for diesel engines only and are not appropriate for gas-engine trucks without further review. The OEM steering stabilizer does not work with the drag link flip required by this kit. A carrier bearing drop bracket kit (part 33700, sold separately) may be required. Gas-engine models may need exhaust modification to clear the front driveshaft. The factory block must be used in conjunction with the ICON leaf springs for the truck to sit level. Tires larger than 37 inches may fit but will require fender trimming and additional modifications.

Common Questions

Does this system work on gas-engine F-250 and F-350 trucks?

The coil springs and leaf springs in the ICON Stage 4 System with Radius Arm are rated for diesel engines only. Gas-engine 2017-2022 Super Duty models may also need the exhaust modified to clear the front driveshaft. Confirm engine compatibility before ordering.

What lift height will my truck actually see?

Front lift height depends on model year and trim. 2017-2019 Super Duty trucks gain 7 inches of front lift over stock. 2020-2022 trucks without the Tremor package gain 7.75 inches. 2020-2022 trucks equipped with the Tremor package gain 6.75 inches. Rear lift height may require taller blocks with the springs to achieve a level stance on 2020-2022 models.

Is a carrier bearing drop bracket included?

A carrier bearing drop bracket kit (ICON part 33700) may be required for this Stage 4 system but is sold separately. Whether it is needed depends on the specific truck configuration; confirm before finalizing the install parts list.

What tire size clears without modification?

The ICON Stage 4 radius arm profile is optimized to allow a 37-inch by 12.50-inch tire to clear at full steering lock without contacting the arm. Tires larger than 37 inches may fit but will require fender trimming and additional modifications.

Can the shocks be rebuilt or revalved later?

Yes. The 2.5 Aluminum Series shocks included in this Stage 4 system are fully rebuildable and revalvable, allowing worn internals to be serviced or the valving to be adjusted for a different load or driving style without replacing the entire shock.