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Zone Features:

1. New front coil springs capable of full coil bind offering off-road performance and great ride quality,
2. Radius arm drop brackets included to properly rotate the front axle,
3. 1-1/2 Solid steel track bar with urethane mounts to properly center the axle
4. New front and rear U-bolt with high nuts and washers
5. Rear 5 inch Block kit to eliminate the factory block - NO stacking blocks
6. Performance custom valved Zone Shocks included.


1. Although rare, if your vehicle is equipped with both a stock 4 rear block and a top mounted over load spring, u-bolt # U4035 may be required

2. Dually trucks will require different rear u-bolts.
3. Vehicles equipped with 2 piece rear driveshaft's may required the carrier bearing to be lowered. If required, order part #F5401.


Installation skill level: 2 of 5

Estimated install time: 6 hrs

Max tire size: 33x12.50

Wheel size: 17x9 with 4.5 inch backspacing

This Fits the Following Applications:

05-07 Ford F250 4WD Gas/Diesel
05-07 Ford F350 4WD Gas/Diesel

The revolutionary new Zone 4" radius arm drop bracket system features new front coil springs that are designed to not only ride great, but will hold up over the long haul. A 1-1/2" solid steel track bar is included to properly center the axle after lifting. This track bar features new oversized, highdurometer urethane bushings for long term performance. The shocks were custom valved to work perfectly with the new Zone coil springs to increase off road performance while still offering unmatched on road ride quality, and the rear kit comes with 5" blocks to replace your factory blocks.

Add Part# Description QTY Retail Price Sale Price
F13A 4" Suspension System 05-07 FORD F-250 799.96 799.96
F13NA 4" Suspension System with Nitro Shocks 05-07 FORD F-250 827.24 827.24
F13B 4" Suspension System 05-07 FORD F-350 799.96 799.96
F13NB 4" Suspension System with Nitro Shocks 05-07 FORD F-350 827.24 827.24

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