D78N 4.5 inch Lift Kit with Radius Arm (Nitro Series)

• Heavy-duty 1/4" steel replacement radius arms, designed for superior strength and ground clearance
• Diesel-specific, progressive rate front coil springs
• HD track bar relocation brackets realigns axles for enhanced stability
• Nitrogen-charged, twin-tube shock design for superior damping performance
• Simple, hassle-free setup with no extensive modifications required

Unmatched Strength & Off-Road Dominance

Take your 2019-2024 Ram 2500 Diesel to the next level with the Zone Offroad 4.5” Lift Kit with Radius Arm (Nitro Series). Designed for those who demand superior strength and off-road capability, this system enhances both performance and appearance. With diesel-specific progressive rate coil springs, massive 1/4" steel replacement radius arms, and high-performance Nitro Series shocks, this lift kit delivers a smooth ride, increased ground clearance, and the ability to run up to 37” tires. Whether you're hitting extreme trails or navigating daily commutes, this kit provides a balanced blend of durability, comfort, and rugged appeal, making it the perfect upgrade for any Ram 2500 owner ready to push their truck’s limits.

Precision Engineering & Heavy-Duty Construction

Built for long-term reliability, the Zone Offroad 4.5” Lift Kit features internally gusseted, heavy-duty radius arms, providing exceptional strength while optimizing front-end caster adjustments for enhanced stability. A forged drop pitman arm corrects steering angles, while HD track bar relocation brackets ensure proper axle positioning. The HD transmission crossmember and transfer case indexing ring allow for correct front driveline geometry, maintaining full 4WD functionality without compromising durability. In the rear, 2.5” heavy-duty coil spacers preserve factory ride quality and towing capacity, while extended sway bar links and new bump stops ensure smooth suspension articulation. The Nitro Series gas shocks, with their twin-tube, nitrogen-charged design and 10-stage velocity-sensitive valving, provide a responsive and comfortable ride on any terrain. Plus, with an easy bolt-on installation and a black powder-coated finish for corrosion resistance, this lift kit is built to handle the toughest conditions for years to come.

• 37 x 12.5 with 20 x 9 and 5.5” backspace
• 35 x 12.5 with 20 x 9 and 4.5” backspace
• Trimming may be required