Fabtech K2128M 8″ Radius Arm System with Stealth Shocks

2008-2016 Ford F-250 4WD 2008-2016 Ford F-350 4WD 2011-2013 Ford F-450 4WD

Brand : Fabtech
SKU : FAB-K2128M
Part Number : K2128M

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Product Details

The 2008–2016 Ford F250/F350 4WD and 2011–2013 Ford F450 4WD (8 lug) can be upgraded with our advanced Radius Arm System designed to improve suspension strength, steering stability, and overall ride performance.

Our patented radius arms feature a fully tubular structure reinforced with dimple-die side plates for exceptional durability. An adjustable alignment cam at the axle allows precise caster correction to ensure proper steering control after lifting.

The front spring lift is achieved using Fabtech coil springs, delivering improved ride quality and consistent suspension performance. Completing the system are a track bar relocation bracket, Pitman arm, sway bar drops and additional components that maintain correct steering and suspension geometry.

Rear lift is provided by replacement leaf springs and a U-bolt kit, ensuring a stable stance and dependable load-carrying capability.

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Fitment

Years	Make	Model	Drive
2008-2016	Ford	F-250	4WD
2008-2016	Ford	F-350	4WD
2011-2013	Ford	F-450	4WD

Features

Fabtech replacement radius arms for increased strength and improved suspension geometry
Fabtech front coil springs providing lift and enhanced ride performance
Track bar relocation bracket ensuring proper axle alignment after lifting
Sway bar drop brackets maintaining correct sway bar positioning and functionality
Pitman arm for corrected steering angles and reduced bump steer
Rear leaf springs offering enhanced load handling and balanced rear suspension performance
Rear U-bolt kit supplying secure mounting and dependable rear lift

Components

1 × FTS22025BK – Coil Box Kit
1 × FTS22139 – Component Box
1 × FTS22114 – Rear Leaf Spring Kit
2 × FTS6189 – Front Stealth Shocks
2 × FTS6063 – Rear Stealth Shocks

Stealth Monotube Shock

Stealth is the first all-black monotube shock absorber featuring a raised metal nameplate that reflects its signature quality at an affordable price. These shocks are engineered with a 46mm high-flow piston and vehicle-specific valving, delivering an exceptional ride—especially when running oversized tires. All Stealth shocks use Nitrocarburized piston rods for superior durability and corrosion resistance compared to chromed rods, finished in matte black for a complete blackout appearance.

50mm OD Seamless Steel Body
46mm High Flow Piston for Best Ride
Vehicle Specific Valving Designed for Oversized Tires
Full Floating Piston Separates Gas from Oil for a Consistent Ride
14mm Nitrocarb Piston Rod Resists Rock Chips and Rusting
All Black Finish with Raised Nameplate as a Signature of Quality

Quick Specs

Tire Size: 355/65R18 — Wheel Size: 18×9.5 with 4 3/4" backspacing (minor trimming required)
Tire Size: 37/13.50R20 — Wheel Size: 20×10 with 4 1/2" backspacing (minor trimming required)

Part Number : K2128M

Important Notes

California Prop 65 Warning
3. Non dually models only.
27. Front drive shaft modification may be required to clear exhaust on gas motor.
29. Rear leaf springs may reduce load carrying capacity.

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