6″ Radius Arm Lift Kit – Performance Shocks – K2429

SKU: K2429 Category: Tags: ,



2023-24 Ford F450/F550 4WD [Diesel]

Fabtech’s 6" Radius Arm lift kit has been built for the Ford F450/F550 Super Duty to handle the on and offroad demands of the truck enthusiast. This system is a heavy duty upgrade to the factory suspension and will provide additional strength to the vehicle.

The heart of this high quality lift kit is Fabtech’s legendary tubular Radius Arms. The tubular structure design is the combination of our extensive offroad racing history and our desire to provide a smooth, compliant driving experience. The result is a suspension system with superior strength that can handle rugged offroad terrain and still navigate a grocery store parking lot with ease.

The heavy duty track bar relocation bracket and new pitman arm center the front axle under the vehicle which allows for full lock steering of 12.50 wide tires on 5" back spacing wheels. The front suspension receives Fabtech’s replacement coil springs that have been developed for a great ride on and off road. The rear suspension gets lift blocks with integrated bump stops that won’t change the ride quality or load carrying capacity.

The redesigned Radius Arms have a new side plate and bold laser cut logo that gives them a modern aggressive look that will turn heads as you tackle the toughest offroad terrain.

This lift kit is backed by our free 5 year 60,000 mile powertrain warranty.


  • Fabtech Radius Arms
  • Fabtech Front Coil Springs
  • Front Performance Shocks
  • Track Bar Relocation Bracket
  • Sway Bar Drop Brackets
  • Pitman Arm
  • Rear Block & U-bolt Kit
  • Rear Performance Shocks

Each Fabtech component of this high quality suspension system has been designed with specific features and benefits.

Radius Arms

Redesigned tubular construction and side plate provide superior strength and modern aggressive look. The arms are offset for full turning radius with 12.50 wide tires on 5" back space wheels. Adjustable alignment cams on the arms allow for an additional 1.5 degrees of caster adjustment.

Coil Springs

The hot wound coils have been designed for a very compliant ride quality both on and offroad. Each coil is preset during the manufacturing process to insure no ride height settling over time. Allows for a 2" increase in wheel travel over stock when used with Fabtech shock absorbers.

Track Bar Bracket

1/4" thick steel bracketry re-positions the factory track bar to center the axle under the vehicle with the increased lift height. Super stout box style bracket is designed to eliminate deflection when the track bar moves through its full cycle.

Dropped Pitman Arm

Forged steel construction with high strength material that exceeds the factory specifications. Designed specifically for the Super Duty to work in conjunction with the factory drag link and Fabtech’s track bar drop bracket for enhanced steering functionality.

Front & Rear Bump Stop Brackets

Heavy duty 1/4" thick steel brackets extend the factory bump stop cushions down to eliminate over cycling of the suspension. The bracket’s heavy duty construction can handle the full impact compression of the massive Super Duty.

Sway Bar Brackets

1/4" thick steel drop brackets re-position the front sway bar for the increased ride height. This allows the sway bar link ends to fully cycle without binding throughout the extended travel range.

Brake Line Brackets

Re-positions the factory brake lines down on the frame for the new travel range without having to open the brake system. Keeps factory fluid system intact.

Steering Stabilizer Brackets

Retains the stock Ford heavy duty steering stabilizer with a 1/4" thick steel bracket and support brace to help reduce tire shimmy.

Rear Lift Blocks

Rear lift blocks replace the stock blocks for additional lift without changing the ride quality of the factory rear suspension or load carrying capacity.

Rear U-Bolts

U-Bolts designed to attach the entire rear differential to the vehicle. A critical part that demands the best quality for your vehicle.

Part Numbers

Qty Part # Description
1 FTS22251 Coil Spring Box
1 FTS22385 Radius Arm Box
1 FTS22274 Rear Block Kit
2 FTS7188 Front Performance Shock
2 FTS7266 Rear Performance Shock

  –  California Prop 65 Warning

    42. Will not fit gas models.
    101. Some models will not sit level after install.
    257. Does not fit vehicles equipped with Ford onboard scale system.