6" 2019-2022 Ford F450/F550 4WD 4-Link Lift Kit by Fabtech

Fabtech’s K2337 6" 4-Link Conversion System for the Ford F-450 and F-550 Super Duty is purpose-built to meet the extreme demands of both on- and off-road performance. Unlike the lighter-duty F-250 and F-350, these heavy-duty models require reinforced components—and this system delivers. The upgrade converts the factory front suspension to a high-articulation 4-link design, dramatically improving ride quality, stability, and terrain adaptability.

This conversion reduces caster change throughout the suspension cycle for improved highway handling and enhances front axle articulation for enhanced off-road performance. Proven through over a decade of use in military, commercial, and consumer applications, this system features robust materials and precise geometry that raise the bar in Super Duty suspension performance.

Engineered for a straightforward installation, each component in this Fabtech kit is designed in-house for uncompromising strength and reliability. Whether you're hauling, towing, or hitting the trail, this system transforms your Super Duty into a more capable, confident machine.

Top Features and Benefits

• 6" front lift height with full 4-link conversion for Ford F-450/F-550 Super Duty
• Heavy-duty 2" OD link arms with 1/4" steel brackets and Fabtech 5 Ton joints® for superior durability
• Reduces caster change for improved on-road handling and increased off-road articulation
• Includes high-performance front coil springs preset to prevent settling and increase wheel travel by 2"
• 1/4" thick steel track bar relocation bracket centers axle at lifted height
• Dropped forged steel pitman arm maintains proper steering geometry
• Heavy-duty bump stop brackets control suspension travel and absorb full compression impacts
• Front and rear sway bar brackets reposition factory components for optimal articulation
• Brake line brackets maintain the OEM fluid system without opening lines
• Steering stabilizer brackets retain the factory long-travel stabilizer and reduce shimmy
• Steel rear lift blocks and U-bolts add lift while preserving ride quality and load capacity
• Includes extended-length performance twin-tube shocks for balanced highway and off-road performance

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 a raised nameplate as a signature of quality

Dirt Logic 2.25 Shock: