2020-2022 Powerstroke 4" Radius Arm Suspension Lift System (BDS1551H)
Built to take full advantage of the factory suspension design, with NX2 or FOX 2.0 Series shocks, these 4" radius arm systems correct suspension, steering and driveline geometry. At the heart of this system is a pair of heavy-duty radius arms built to withstand whatever abuse you can throw at them. They use a high clearance design for extra ground clearance and are formed inward to allow for additional clearance of oversized tires. They incorporate factory-style 3-1/4" rubber bushings to minimize road vibrations and allow for a long, maintenance-free bushing life. The arms bolt into the factory mounting points and reposition the front axle to correct the caster angle. The additional 4" of lift comes from a pair of full-length diesel of gas-specific ProRide coil springs.
Tire & Wheel Combinations:
- 37x12.50 w/ 17x9 and 4.5"-5"
- 37x12.50 w/ 18x9 and 4.5"-5"
- 37x12.50 w/ 20x9 and 4.5"-5"
- Removal of the factory leaf spring block required. Net rear lift will vary depending on the height of the factory block but will result in a level stance.
- If equipped with a 2-piece rear driveshaft, a Carrier Bearing Drop Kit may be required (BDS123402)
- Front exhaust modification may be required to clear the front driveshaft (Gas Only)
- Torque wrench capable of 405 ft-lbs required.
- 37 x 12.50 tires may require minor trimming.
- Due to taller factory ride height, Tremor models will not net full advertised lift height. Final ride height will be the same as standard models.
- If installed on a truck with a top-mounted overload spring, with an overload spacer block taller than 1-1/8" UBT4027 (Qty: 4) are required)
- Although this is pictured with Fox Shocks, this kit will come equipped with BDS Shocks. If you would like fox shocks, please reach out.
- Click Here For Installation Instructions
- Difficulty: 4 (where 1 = easiest and 5 = complicated)
Part Number: BDS1551H
Front Coil Springs
4" Front Box Kit
This Box Kit Includes the following:
- Pitman Arm
- Driver & Passenger Side Brakeline Bracket
- Front Bump Stop Extension
- Trackbar Bracket
- Track Bar Cam Washer
- Bolt Pack - Sway Bar Drop Bracket
- Bolt Pack - Bump Stops
- Cotter Pin
- Zip Ties
4.5" Rear Block Kit
4" Rear Leaf Spring (2x)
2017-2020 SUPER DUTY 4" REAR LEAF SPRING BOX KIT 013438
4" Rear Leaf Spring Box Kit
This is required if you selected full Leaf Spring Replacements.
Radius Arm Box Kit