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Heavy-Duty Radius Arms for Strength and Alignment
This system replaces the factory stamped steel radius arms with a pair of high-strength tubular BDS arms. These arms bolt into the factory mounts, include OE-style rubber bushings for quiet, service-free operation, and allow for caster adjustments to dial in alignment across a wide range of lift heights.
Pro-Ride Coil Springs for Diesel Applications
Engineered specifically for diesel engines, the included full-length Pro-Ride coil springs deliver a full 4-inch front lift. These springs ensure excellent ride quality and control across paved roads and rugged terrain alike, giving your truck the stance and ground clearance it deserves.
Optimized Steering Geometry
A forged drop pitman arm is supplied to correct steering angles, paired with a heavy-duty track bar relocation bracket to maintain proper steering alignment and minimize bump steer. Together, they keep the axle centered and the front-end geometry in phase during full suspension travel.
Rear Lift System and Shocks
The rear lift is achieved through a high-strength fabricated lift block and U-bolt flip kit, maximizing ground clearance. Extended brake line brackets and a set of premium nitrogen-charged NX2 Nitro or FOX Performance shocks round out the rear system for consistent performance and stability under load.
Vehicle Compatibility
This 4-inch lift system is designed for the following Ford Super Duty models equipped with 4WD diesel powertrains:
| Year | Make | Model | Drive | Engine |
|---|---|---|---|---|
| 2011–2016 | Ford | F-250 Super Duty | 4WD | Diesel |
| 2011–2016 | Ford | F-350 Super Duty | 4WD | Diesel |
Included Components
This BDS Suspension system includes:
- 4" diesel-specific Pro-Ride front coil springs
- Heavy-duty tubular radius arms with caster adjustment
- Forged drop pitman arm
- Track bar relocation bracket
- Sway bar relocation brackets
- Brake line relocation brackets
- High-clearance rear lift block and U-bolt flip kit
- NX2 Nitro or optional FOX Performance shocks (front and rear)
Installation Notes
The installation process is straightforward for experienced technicians and takes approximately 6–8 hours. Key considerations:
- Factory rear block must be removed to achieve level stance
- If equipped with a two-piece driveshaft, a driveshaft alignment kit may be necessary
- Front/rear driveline vibrations are extremely rare but possible
- If equipped with a rear sway bar, use BDS #123009
- This system is not compatible with dual rear wheel models
Quick Specs Overview
| Component | Specification |
|---|---|
| Front Lift Height | 4" |
| Rear Lift Height | 4" |
| Front Lift Method | Coil Springs |
| Rear Lift Method | Leaf Spring |
| Shocks Included | Yes |
| Part Numbers | BDS1597FS / BDS1597H |
Wheel and Tire Fitment
To ensure full clearance and ideal stance, BDS recommends the following wheel and tire combinations:
- 35 x 12.5 tires with 18 x 9 wheels and 4.5" backspacing
- 35 x 12.5 tires with 20 x 9 wheels and 4.5" backspacing
Performance Comparison: Stock vs. Lifted
| Feature | Stock Suspension | BDS 4" Lift |
|---|---|---|
| Ride Quality | Factory tuned | Improved with nitrogen-charged shocks |
| Ground Clearance | Standard height | Increased by 4 inches |
| Maximum Tire Size | 33" | 35" |
| Steering Geometry | Flat steering angle | Corrected with pitman arm + bracket |
Product Notes
For California residents: This product contains chemicals known to the State of California to cause cancer and reproductive harm. PROP 65 WARNING applies.
Where Performance Meets Precision
The BDS 4-Inch Radius Arm Lift Kit brings your Ford Super Duty to the next level—literally and figuratively. With OE-style integration, advanced suspension geometry, and unmatched component quality, this kit ensures your diesel truck is ready for demanding trails or everyday hauling.
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