Fabtech Radius Arm Kit

2013–2018 Ram 3500

K3077DL

Overview:

The Fabtech Radius Arm Kit is a premium 5-inch lift suspension system designed specifically for 2013 to 2018 Ram 3500 trucks. This kit enables the installation of the robust Dirt Logic 4.0 Resi Coilovers on the front suspension, delivering exceptional off-road capability while maintaining a smooth highway ride. Ideal for enthusiasts seeking enhanced suspension travel and superior damping performance, this system transforms your Ram 3500 into a more capable and comfortable off-road machine.

Built to accommodate larger tires up to 37 inches with minor trimming, the Fabtech Radius Arm Kit is perfect for those who demand both rugged durability and refined ride quality in demanding terrain.

Key Features:

This comprehensive radius arm coilover conversion system offers a range of advanced features engineered for strength, performance, and reliability:

• 5-inch lift height for increased ground clearance and suspension travel
• Utilizes factory upper coil bucket reinforced with support gussets for enhanced strength
• Lower mounts weld directly to the axle housing with cross support gussets for the factory TracK Bar bracket
• Includes Dirt Logic 4.0 Resi Coilovers featuring stainless steel bodies for superior corrosion resistance
• Remote billet aluminum reservoirs on coilovers for improved heat dissipation and consistent damping
• Rear Dirt Logic shocks included for balanced suspension performance front and rear
• Compatible with tire sizes up to 37/13.50R22 with minor trimming
• Designed specifically for Ram 3500 models without factory air suspension

Construction & Design:

The Fabtech Radius Arm Kit is engineered with durability and longevity in mind. The system leverages the factory upper coil bucket, reinforced with gussets to withstand the rigors of off-road use. The lower mounts are welded to the axle housing, providing a solid foundation and maintaining factory TracK Bar alignment through cross support gussets. The Dirt Logic 4.0 Resi Coilovers feature stainless steel bodies that resist corrosion and wear, while their remote reservoirs are crafted from billet aluminum to ensure optimal heat management and consistent damping performance.

Every component is designed to deliver a balance of strength, reliability, and refined ride quality, making this kit a robust upgrade for serious Ram 3500 owners.

Installation & Fitment:

Installation of the Fabtech Radius Arm Kit requires welding and drilling approximately 10 holes, with an estimated installation time of 5 to 6 hours. Due to the nature of the modifications, professional installation is recommended to ensure proper fitment and safety. This kit is compatible with the following Ram 3500 models:

• Big Horn (2013–2018)
• Laramie (2013–2018)
• Laramie Limited (2014–2015)
• Laramie Longhorn (2013–2018)
• Limited (2016–2018)
• Lone Star (2013–2015, 2017)
• SLT (2013–2018)
• ST (2013)
• Tradesman (2013–2018)

Please note this kit will not fit Ram 3500 trucks equipped with factory air suspension.

What's Included:

• Fabtech 5" Radius Arm Coilover Conversion system
• Dirt Logic 4.0 Resi Coilovers with stainless steel bodies and remote billet aluminum reservoirs (front)
• Dirt Logic shocks (rear)
• Support gussets for upper coil buckets and lower mounts
• All necessary hardware for installation

Ideal For:

This radius arm kit is ideal for Ram 3500 owners who want to upgrade their suspension for enhanced off-road performance without sacrificing on-road comfort. It suits enthusiasts who run larger tires and require a durable, high-quality coilover system capable of handling rough terrain, heavy loads, and demanding driving conditions. Whether for work or recreation, this kit provides a reliable suspension upgrade that balances toughness with ride quality.

Fabtech is an off-road suspension leader producing lift kits, shocks, and related components to increase ride height, clear larger tires, and improve capability. Their systems are engineered for specific trucks and SUVs, blending on-road drivability with the added travel and strength enthusiasts want for trails, desert runs, and overland builds.