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Zone Features:

1. Front coil springs offering off-road performance and great ride quality that will not sag.
2. 1/4" boxed steel radius arms, utilizing 2 1/2" greasable urethane bushings.
3. 1-1/2" Solid steel track bar featuring specifically engineered bushings.
4. Yellow zinc plated rear u-bolts with high nuts & hardened washers.
5. Rear 5" block kit to eliminate the factory block - NO stacking blocks!
6. Performance custom valved Zone Shocks included.


Removal of the factory rear block is required. Net rear height gain will vary based on size of the factory block, but will result in a level stance.
If equipped with a 2-piece rear drive shaft, then a driveshaft alignment kit may be required. It is available in the optional accessories (part # F5401).
Although extremely rare, front and/or rear drive line vibration may occur.
Rear box kit not designed for dually models.
Front exhaust modification may be required to clear the front driveshaft on gas models.


Installation skill level: 2 of 5

Estimated install time: 6 hrs

Max tire size: 35x12.50
Wheel size: 17x9
Back Spacing: 4.5 inch

This Fits the Following Applications:

11-16 Ford F250 4WD
11-16 Ford F350 4WD

The new Zone Offroad 2011-16 Ford Super Duty 4" radius arm suspension lift features tough replacement radius arms that are considerably stronger, made of inch steel, fully boxed, and utilizing large 2-1/2 inch, greasable urethane bushings. The arms bolt directly into the stock location, and position the axle for the proper caster and wheel location. The lower mount point at the axle utilizes our popular cam lock design, making it adjustable for 4 inch or 6 inch of lift.

Engine specific front coil springs are designed to not only ride great, but will hold up over the long haul. A 1-1/2 inch solid steel track bar is included to properly center the axle after lifting. This track bar features new oversized, high-durometer (hardness) urethane bushings for long term performance and improved handling. The system is comes with custom valved Zone hydraulic or choose to upgrade to the Nitro shocks for better towing and handling performance.

The rear is lifted with a 5 inch block used to replace the factory block instead of stacking blocks. This system is also one of the easiest installations on the market because of the use of a front track bar and rear block kit. If you are looking to not only lift your Super Duty, but improve the looks, strength, and feel of your suspension, choose the Zone Offroad radius arms system.

Add Part# Description QTY Retail Price Sale Price
F26A 4" Radius Arm Suspension System 11-16 FORD F-250 1053.48 1053.48
F26NA 4" Radius Arm Suspension System with Nitro Shocks 11-16 FORD F-250 1080.76 1080.76
F26B 4" Radius Arm Suspension System 11-16 FORD F-350 1053.48 1053.48
F26NB 4" Radius Arm Suspension System with Nitro Shocks 11-16 FORD F-350 1080.76 1080.76

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