If you own a 2018 Ford F450 or F550 Super Duty, you know these trucks are built tough. But let’s be honest, the factory suspension can leave a bit to be desired, especially if you're the kind of person who likes to push boundaries both on and off the road. That’s where Fabtech’s 6" Radius Arm system comes into play. This isn’t just any suspension upgrade; it’s a serious enhancement designed to handle the heavy-duty demands of your truck.
What makes this system special? For starters, it’s tailored specifically for the F450 and F550, which have a beefier suspension setup compared to the F250 and F350. You’re going to appreciate the extra strength when you're fitting oversized tires—think 37-inch tires that really fill out those wheel wells. This system has been battle-tested over a decade, proving its worth in consumer, commercial, and even military applications. So, you know it’s built to last.
The high-quality components and well-thought-out suspension geometry are what set this apart from the rest. Each piece is designed with a purpose, ensuring you get a suspension that performs well on rough terrain while still keeping your ride smooth on the highway. Plus, it comes with front and rear Dirt Logic Shocks, which are a game-changer for handling those bumps and dips.
If you’re planning to run 37/12.50R17 tires on a 17x9 wheel with 4 3/4" backspacing, you might need to do a bit of trimming, but it’s worth it for the look and performance. The same goes for 37/12.50R18s on an 18x9 wheel or even 37/13.50R20s on a 20x9 wheel. Just keep in mind, some models may not sit perfectly level after the install, but that’s just a minor detail in the grand scheme of things.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Fabtech is an aftermarket automotive company that specializes in creating suspension parts for various pick-up trucks, SUVs, and other offroad vehicles. They have been doing the business for more than 20 years and have consistently provided their customer products that are top-notched and have garnered multiple awards for its innovative design. Today, they have established their brand as one of the leading companies in the market.
Advanced Manufacturing FacilityThe company uses advanced technology to its advantage in creating its products. By utilizing the most high-tech software available, they are able to create designs that are on the cutting edge. All their works and manufacturing processes are done in house using their 100,000 sq feet facility. It houses multiple laser cutters, forming equipment, CNC machines, robotic welders not to mention the leading skilled welders and engineers that help the company create a consistent product that has the same high quality expected from them.
Fabtech creates their product to be easy to install and should provide a trouble-free experience to all their clients. Their product comes with all the necessary hardware needed and is a direct fit to the original parts’ location.
All their products have been tried and tested rigorously to make sure that it passes the high-quality standard the company has imposed on itself. This allows their customers to have a product that is superior to its competitors and functions the way it’s supposed to do.
Purchase Fabtech Products at Vivid RacingIf you want a suspension to upgrade for your vehicle that would be able to improve the way your car look and perform, then Fabtech is the brand for you. They offer products for different vehicles makes such as the ones from Toyota, GM, Ford, Nissan, Chevy and Jeep to name a few. Visit Vivid Racing and check out the list of their products that would fit your specific vehicle.