Configured with NX2 Nitro Series shocks featuring a nitrogen-charged twin-tube design, 10-stage velocity-sensitive valving, dual-welded ends for increased strength, a 1-3/8-inch high-flow piston, self-lubricating seals, and a silver powder coat finish.
Overview
The BDS 4" Radius Arm Lift Kit is engineered for the 2020–2022 Ford F-450 Super Duty 4WD, delivering strength, durability, and reliable everyday performance. A radius-arm setup excels in simplicity, long-term dependability, and predictable handling — qualities particularly well suited to heavy-duty trucks like the F-450. Heavy-duty BDS radius arms handle serious workload demands while maintaining confident steering feel and excellent stability under towing and hauling conditions.
The kit includes Pro-Ride coil springs for proper lift height and ride quality, a forged drop pitman arm and heavy-duty track bar drop bracket for steering geometry correction, and your choice of shock absorber — BDS NX2 Nitro Series, FOX 2.0 Performance Series, or FOX 2.5 Performance Elite with DSC adjusters.
Features
- Heavy-duty DOM steel radius arms replace factory stamped steel units
- Radius arms restore proper caster angle, axle alignment, and suspension geometry for predictable steering and stable handling
- Caster adjustment accommodates a wide range of lift heights
- OE-style rubber bushings at frame mounts isolate noise and vibration, provide a smoother and quieter ride, and require no ongoing greasing or maintenance
- Full-length Pro-Ride coil springs provide correct lift height and smooth, predictable ride across various terrains
- BDS forged drop pitman arm maximizes steering radius at 4 inches of lift
- Heavy-duty track bar drop bracket recenters the front axle and keeps steering geometry in phase through suspension travel
- Choice of FOX shocks ranging from 2.0 to 2.5 Performance Elite
Specifications
- Lift Height: 4 inches
- Radius Arm Material: Heavy-duty DOM steel
- Pitman Arm: BDS forged drop
- Coil Springs: Full-length Pro-Ride
- Frame Mount Bushings: OE-style rubber
- Vehicle Fitment: 2020–2022 Ford F-450 Super Duty 4WD
Installation
- Estimated Installation Time: 8–10 hours
- Difficulty: Difficult
- Tools Required: Cut Off Wheel or equivalent, Reciprocating Saw, Welding Equipment
Important Notes
These kits are designed for the F-450 style front end. They do not work with the standard Ford Super Duty F-250/350 axle width.
