Note: With Free Shock Boot Covers


  • Black Shock Boot Covers, To Protect Shock From Dust and Debris Included Free Of Charge With This Purchase.
  • Front coil springs offering off-road performance and great ride qualtiy that will not sag.
  • 1/4in boxed steel radius arms, utilizing 2 1/2in greasable urethane bushings.
  • 1-1/2in Solid steel track bar featuing specifically engineered bushings.
  • Yellow Zince plated front & rear u-bolts with high nuts & hardended washers.
  • Rear 5in block kit to eliminate the factory block - NO stacking blocks!
  • Performance custom valved Zone Shocks selection.


  • If vehicle is equipped with rear top mounted overload springs 4 of u-bolt part number UBT4035 may be required.
  • Dually trucks will require different rear u-bolts.
  • Vehicles equipped with 2 piece rear driveshafts may required the carrier bearing to be lowered. If requried, order part # ZONF5401.

Quick Specs

  • Front Lift Height: 4 Inch
  • Front Lift Method: Radius Arm System
  • Rear Lift Height: 3 Inch
  • Rear Lift Method: Block kit
  • Install Time Hrs: 6
  • Difficulty Level 1-5: 2
  • Wheel Size: 17 x 9
  • Back Spacing: 4.5 Inch
  • Max Tire Size: 35 x 12.50

The 4in Super Duty Radius Arm Systems include everything you need and more, including bullet proof radius arms made with 1in steel for optimal ground clearance compared to other drop bracket kits on the market, and gas or diesel specific coils that are made in America that will not sag. A 1-1/2in steel track bar is included in the 4in system to properly align the front axle after lifting. To avoid stacking rear blocks or going too tall with a single block, Zone includes a 5in cast iron block with an integrated bump stop.

  • UPC: 655623719084
  • Brand: Zone OffRoad
  • 2005-2007 Ford F250 F350 Super Duty



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