6" 2017 Ford F450/F550 4WD Radius Arm Lift Kit by Fabtech

Fabtech’s K2282 / K2282M / K2282DL 6" Radius Arm Lift Kit for the Ford F-450 and F-550 Super Duty is engineered to handle the extreme on- and off-road demands of heavy-duty truck owners. Built specifically for the robust suspension systems found on these models, this high-performance upgrade replaces factory components with reinforced, purpose-built parts designed to accommodate oversized tires and deliver lasting strength.

This complete suspension system features Fabtech’s signature tubular Radius Arms with dimple die side plates, built for superior durability and clearance. Each component has been developed through over a decade of proven performance across consumer, commercial, and military applications. With optimized suspension geometry, ride quality, and wheel travel, this lift kit offers a substantial upgrade for any serious Super Duty build.

From hot-wound coil springs to a high-strength track bar bracket, sway bar drop brackets, and heavy-duty bump stop extensions, every part is designed to work seamlessly with the F-450/F-550 chassis. The result is a lift system that not only enhances off-road capability but also maintains on-road comfort, stability, and steering precision.

Top Features and Benefits

• 6" lift kit designed specifically for Ford F-450 and F-550 Super Duty trucks
• Heavy-duty tubular Radius Arms with dimple die side plates for maximum strength
• Offset arm design allows a full turning radius with wide tires on the Dana Super 60 front axle
• Built-in 1° caster with adjustable cams for an additional 1.5–2° of alignment flexibility
• Hot-wound front coil springs deliver a compliant ride quality and increased wheel travel
• Track bar relocation bracket centers the front axle at the lifted ride height
• Dropped forged steel pitman arm ensures proper steering geometry
• 1/4" thick front and rear bump stop brackets prevent over-cycling under heavy loads
• Steel sway bar drop brackets maintain correct sway bar geometry
• Brake line brackets reposition factory lines without opening the hydraulic system
• Steering stabilizer brackets retain the factory stabilizer and reduce tire shimmy
• Steel rear lift blocks add height without affecting load capacity or ride comfort
• High-quality U-bolts secure the rear differential with enhanced durability
• Extended twin-tube performance shocks support both on-road and off-road use

Performance Twin Tube Shock:

• Twin Tube Hydraulic Construction
• 9/16″ Hardened Chrome Piston Rod
• 1 3/8″ OD Piston
• Closed Cell Foam insert
• High Flow 9-Stage Valving

Stealth Monotube Shock:

• 50mm OD Seamless Steel Body
• 46mm High Flow Piston for the best ride
• Vehicle-specific valving designed for oversized tires
• A full-floating piston separates gas from oil for a consistent ride
• 14mm Nitrocarb piston rod resists rock chips and rusting
• All black finish with raised nameplate as a signature of quality

Dirt Logic 2.25 Shock: