Fabtech Coil Spring Suspension System

2013–2018 Ram 3500 4WD Diesel

K3143DL

Overview:

The Fabtech Basic Kit for Ram 3500 trucks from 2013 to 2018 is engineered to enhance your vehicle’s suspension with a focus on ride quality and load handling. Designed specifically for diesel-powered 4WD models, this coil spring suspension system replaces the factory high-rate bowed springs with a unique straight coil spring design. This innovation delivers a noticeably smoother on-road ride while maintaining the factory load-carrying capacity, making it ideal for drivers who demand comfort without sacrificing utility.

Fabtech’s patent-pending angled lower mounts work in tandem with the straight springs to reduce harshness and improve response over varying terrain. Whether you’re hauling heavy loads or tackling rough off-road conditions, this suspension system provides a balanced performance that outperforms stock setups and other aftermarket options.

Key Features:

Fabtech’s coil spring suspension system offers several advanced features that set it apart from the competition:

• Industry-exclusive straight coil spring design for a smoother ride compared to factory bowed springs
• Patent-pending angled lower spring mounts to enhance ride quality and suspension articulation
• Maintains factory load-carrying capacity for heavy-duty applications
• Designed specifically for 2013–2018 Ram 3500 4WD diesel models
• Supports tire sizes up to 37 inches with minor trimming required
• Compatible with 17x9 to 22x9.5 wheels with 5-inch backspacing
• Improves suspension response to road irregularities for enhanced driver comfort
• Durable construction built to withstand off-road abuse and heavy loads
• Does not fit gas engine models or vehicles equipped with factory air suspension

Construction & Design:

Fabtech’s coil springs are crafted from high-quality steel engineered for strength and durability. The straight spring design reduces the spring rate compared to factory bowed springs, which naturally ride stiff. This lower spring rate allows for improved absorption of bumps and road imperfections, resulting in a smoother driving experience without compromising the truck’s ability to carry heavy payloads.

The patent-pending angled lower mounts are precision-engineered to optimize spring positioning and suspension geometry. This design innovation reduces harshness and improves articulation, allowing the suspension to better adapt to off-road terrain and heavy-duty use. Every component is finished with corrosion-resistant coatings to ensure long-lasting performance in harsh environments.

Installation & Fitment:

The Fabtech Basic Kit is designed for straightforward installation on 2013–2018 Ram 3500 4WD diesel trucks. Minor trimming of the fender or wheel well area may be required to accommodate larger tires up to 37 inches in diameter. This kit is compatible with a range of wheel sizes from 17x9 to 22x9.5 with 5-inch backspacing.

Please note this suspension system is not compatible with gas engine models or trucks equipped with factory air suspension. Professional installation is recommended to ensure proper fitment and optimal performance.

What's Included:

• Front coil springs with straight spring design
• Patent-pending angled lower spring mounts
• Hardware and mounting components required for installation
• Detailed installation instructions

Ideal For:

This Fabtech suspension kit is ideal for Ram 3500 owners who want to improve ride comfort and handling without sacrificing load capacity. It is perfect for drivers who frequently haul heavy payloads, tow trailers, or venture off-road and require a suspension system that balances durability with smooth performance. Enthusiasts looking to fit larger tires up to 37 inches will also benefit from this kit’s compatibility and design.

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.