4 Link Lift System
Questions about fitment? Live chat or call 866-235-4715
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- Free shippingMost orders $500+
- 30-day returnsSee policy
- Warranty supportWe work with the maker
Questions about fitment?
Talk to a TRU specialist
We’ll help you verify fitment before you buy.
Veteran-owned · Austin, Texas · Mon–Fri 9:30a–11:00a & 1:00p–5:30p CT
TRU specialist notes
From the Trucks R Us fitment and install team, beyond the manufacturer's information.
- Plan for a professional wheel alignment after installing any lift or leveling kit.
- Going to bigger tires as well? Speedometer recalibration may be needed, and some tire and wheel combinations need trimming. Check the recommended wheels and tires, or ask us before you order.
Specifications
| Brand | Fabtech |
|---|---|
| Part number | K2337M |
| Lift/Drop Height | 6 IN |
| Country of Origin | US |
| Warranty | Lifetime |
| Weight (lbs) | 307 |
California Proposition 65 warning applies to this product. www.P65Warnings.ca.gov
Features
- Everything You Will Need To Lift Your Vehicle
- Provides Unsurpassed Articulation And Wheel Travel
- Heavy Wall Links
- Race Style Uniball For Superior Strength
- In-field testing and multiple vehicle fit checks ensure products will fit properly during installation and provide years of trouble free service with superior vehicle ride qualities.
- No Cutting Or Welding
- Ultimate In Suspension Performance
Fitment
| Years | Vehicle |
|---|---|
| 2019-2021, 2023 | Ford F-450 Super Duty 4WD |
| 2019-2021, 2023 | Ford F-550 Super Duty 4WD |
Use the fit check above with your truck selected, or ask a specialist if your trim isn't listed.
Installation
Free install support from the Trucks R Us tech team, for you or your shop.
Overview
2019-22 Ford F450/F550 4WD
Fabtech’s 6″ 4 Link Conversion system for the Ford F450 and F550 Super Duty is built to handle the on and offroad demands of the truck enthusiast. This vehicle’s suspension is more robust than the Ford F250 and F350 and therefore demands specialty parts only available from Fabtech.
This system comes with everything needed to convert to a 4 Link front suspension. The system will provide less caster change throughout the travel range which benefits on road driving. Offroad the 4 Link system will provide more articulation than a Radius Arm for increased terrain traversing at all speeds.
Fabtech’s 4 Link System has been proven in over 10 years of service in consumer, commercial and military applications. High quality components with properly design suspension geometry is the pinnacle of Super Duty suspension systems.
Each Fabtech component is expertly built in house and has specific design features and benefits as listed below.
Features
- Fabtech Heavy Duty Link Arms
- Fabtech Front Coil Springs
- Trac Bar Relocation Bracket
- Sway Bar Drop Brackets
- Pitman Arm
- Rear Block & U-bolt Kit
LINK ARMS & BRACKETS
2″ OD Heavy wall link arms have 1/4″ thick steel brackets at the axle with adjustable alignment cams and Fabtech’s legendary 5 Ton joints® to pivot at the frame for an extended service life. The 5 Ton joints® have been proven in military use for over 10 years and are quiet and strong. The 4 Link Arms attach to stout 1/4″ thick steel frame brackets for a solid mounting of the new suspension.
The geometry of the 4 Link arms and frame brackets has been designed to provide an improved highway ride due to reduced caster change and able to tackle rough offroad conditions better than a Radius Arm suspension.
COIL SPRINGS
coil springs have been designed for a very compliant ride quality both on and offroad. Each coil is preset during the manufacturing process to insure no ride height settling over time. Allows for a 2″ increase in wheel travel over stock when used with Fabtech shock absorbers.
TRACK BAR BRACKET
1/4″ thick steel bracketry rep-ositions the factory track bar to center the axle under the vehicle with the increased lift height. Super stout box style bracket is designed to eliminate deflection when the track bar moves through its full cycle.
DROPPED PITMAN ARM
Forged steel construction with high strength material that exceeds the factory specifications. Designed specifically for the F450 and F550 to work in conjunction with the factory drag link and Fabtech’s Track Bar bracket for proper steering functionality.
FRONT & REAR BUMP STOP BRACKETS
Heavy duty 1/4″ thick steel brackets control the travel eliminating over cycling of the suspension. Super strong construction can handle the full compression impact of the F450 or F550.
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 factory F450 or F550 long travel steering stabilizer with a 1/4″ thick steel bracket and support brace to help reduce tire shimmy.
REAR LIFT BLOCKS
Steel rear lift blocks replaces the factory blocks for additional lift without changing the ride quality or load carrying capacity.
REAR U-BOLTS
U-Bolts designed to attach the entire rear differential to the vehicle. A critical part that demands the best quality for your vehicle.
STEALTH SHOCKS
These extended length monotube shocks have a Nitrocarb piston rod for corrosion resistance and resist rock chipping. Great highway ride with good offroad damping capacity.
Part Numbers
| Qty | Part # | Description |
|---|---|---|
| 1 | FTS22251 | Coil Box Kit |
| 1 | FTS22221 | Component Box 1 |
| 1 | FTS22312 | Component Box 2 |
| 1 | FTS22274 | Rear Block Kit |
| 2 | FTS6188 | Front Stealth Shocks |
| 2 | FTS6063 | Rear Stealth Shocks |
– California Prop 65 Warning
-
FOOTNOTES
101. Some models may not sit level after install.
179. Front driveshaft modification is required or order an aftermarket driveshaft.
256: Does not fit vehicles with Ford fat boy steering option. Contact dealer with VIN to verify steering box.
Questions
Will this fit my truck?
Select your truck at the top of the page and the fit check will confirm it. If your exact trim is not listed, call 866-235-4715 or live chat and a fitment specialist will check it before you order.
Do you help with installation?
Yes. Our technical team helps you or your shop with installation and troubleshooting after delivery, on top of the manufacturer’s support.
What if the part has a problem?
We work the warranty claim with the manufacturer on your behalf, within the manufacturer’s warranty policy.
Can I return it?
Most items can be returned within 30 days. See our return policy for details.
Do I need an alignment after installing?
Yes. Any lift or leveling kit changes suspension geometry, so get a professional alignment after installation.
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