Fabtech’s Radius Arm system for the Ford Super Duty is built to handle the on and offroad demands of the truck enthusiast. This system is a complete upgrade to the factory suspension and will provide additional strength for use with oversized tires.

The heart of this quality system is Fabtech’s tubular Radius Arms. The design of these arms comes from Fabtech race components built with a tubular structure reinforced by a dimple die side plate and heavy gusseting for rugged offroad use. They are a superior upgrade to the stock stamped arms.

Included in this system is the massive Dirt Logic 4.0 Coilover Conversion for outstanding damping capacity offroad with a quality on road ride. The Coilover bolts in place of the factory coil spring without removal of the coil spring bucket. The giant 4" diameter aluminum remote reservoir mounts horizontally above the Coilover to allow for full compression travel with oversized tires. The Dirt Logic 4.0 Coilover is the biggest and baddest on the market for the Ford Super Duty.

High quality components with properly designed suspension geometry is what sets this system apart from all other Radius Arm suspensions. System includes a free 5 year 60,000 mile powertrain warranty.

Each Fabtech component has been designed with specific features and benefits that create this quality suspension system. For a greater understanding of each these components, please see below.

• Fabtech Replacement Radius Arms
• Front Dirt Logic 4.0 Resi Coilovers
• Trac Bar Relocation Bracket
• Sway Bar Drop Brackets
• Pitman Arm
• Rear Add-a-leaf Kit
• Rear Block & U-bolt Kit

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.

DRIVESHAFT SHIM KIT

Allows for incremental rear driveline angle change at the carrier bearing on two piece driveshaft applications to eliminate vibration with the increased ride height.

REAR ADD-A-LEAF

A single leaf is inserted into the spring pack to provide an additional 1.5" of rear lift.

REAR LIFT BLOCKS

Cast iron 5" rear lift blocks provide additional lift without changing the ride quality of the factory rear suspension or load carrying capacity.

REAR SWAY BAR BRACKETS

Brackets reposition the sway bar end links down on the frame for the new ride height allowing for proper sway bar functionality without binding.

REAR U-BOLTS

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

DIRT LOGIC 2.25 SHOCKS

Constructed of a stainless steel body with NitroSteel® piston rod for maximum corrosion resistance and durability. Superior ride quality both on and offroad. Excellent damping for offroad use.

OTY	PART #	DESCRIPTION
1	FTS22139	COMPONENT BOX
1	FTS22105	REAR BOX KIT
1	FTS835236D	FRONT DIRT LOGIC 4.0 RESI COILOVER [DRIVER]
1	FTS835236P	FRONT DIRT LOGIC 4.0 RESI COILOVER [PASSENGER]
2	FTS810052	REAR DIRT LOGIC 2.25 SHOCK

INCLUDED SHOCKS

INCLUDED SHOCKS

FRONT DIRT LOGIC 4.0 RESI COILOVER

The Dirt Logic 4.0 provides the ultimate in hardcore offroad dampening capacity with superior highway comfort in a big package. This massive high end shock is designed for full size vehicles that required the biggest and best Coilover shock in a bolt on configuration. Nothing else comes close.

 

• 4.0″ OD Stainless Steel Body
• 3 5/8″ OD Billet Aluminum Piston
• 1 1/4″ NitroSteel® Black Piston Rod
• Adjustable Coilover Construction
• 3/4″ Spherical Ball Mounting Ends
• 4.0″ OD Aluminum Resi

REAR DIRT LOGIC 2.25 SHOCK

Dirt Logic 2.25’s are designed to replace factory shocks with a larger, more robust configuration. The 2.25 size is what separates it from other replacement take apart shocks for a superior ride, both on and off road. Shocks are pretuned for each Fabtech suspension, accounting for larger tires, providing the finest all around damping.

 

• 2.25″ OD Stainless Steel Body
• 2.0″ OD Billet Aluminum Piston
• 7/8″ NitroSteel® Black Piston Rod
• Polyurethane Mounting Ends

TIRES & WHEELS

• Tire Size – 355/65R18 Wheel Size – 18×9.5 w/ 4 3/4in BS w/minor trimming
• Tire Size – 37/13.50R20 Wheel Size – 20×10 w/ 4 1/2in BS w/minor trimming

ADDITIONAL INFORMATION

SYSTEMS	RADIUS ARM SYSTEM
MODEL	F250
MAKE	FORD
DRIVE	4WD
LIFT	8"
YEAR	2011, 2012, 2013, 2014, 2015, 2016

FOOTNOTES

27. Front drive shaft modification may be required to clear exhaust on gas motor.

INSTRUCTIONS

PDF DOWNLOADS

• FT22078
• FT22105
• FT22139
• FT810052