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Zone 4.5

Zone 4.5" Radius Arm Lift LKit | 2019-2020 RAM 2500 4WD Diesel

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USD 06-12-2022

Free shipping to the lower 48

Financing Available

All Zone products are experiencing 5-6 weeks delayed shipping. Additional delays are possible.

Part Number



Zone Offroad expands its listings for the late model 2019-2020 RAM 2500 4WD Diesel trucks with new 4.5" radius arm systems that are on the shelf ready to ship. Designed to improve the looks and performance of your new RAM, these kits include everything necessary to correctly lift them for improved offroad capability with room for larger tires while maintaining on-road handling.

Up front these systems use a pair of progressive rate (diesel specific) 4.5" coil springs to provide the extra height and smooth controlled performance in the harshest of terrains. A forged drop pitman arm is supplied to correct steering angles along with a HD bar drop bracket to recenter the front axle. A pair of sway bar drop brackets reposition the OE sway bar for optimal performance along with extended polyurethane bump stops to limit up travel and brake line brackets to allow full droop. To correct the front suspension geometry at the new height, Zone Offroad provides a pair of heavy duty replacement radius arms that bolt directly into the factory location. These new arms are massive upgrade to the factory stamped units, built from 1/4" American made steel, internally gusseted with a lower cam adjustment to dial in front end caster.

At 4.5" of lift it is critical to correct the front driveline angle to maintain use of the 4WD. To do this Zone Offroad provides a heavy duty replacement transmission crossmember as well as a transfer case indexing ring to reposition the front driveline output to allow use of the factory drivelines. In the rear of the RAM 2500 kits 2.5" heavy duty coil spacers supplied to level out the stance. These allow you to retain factory ride quality without effecting tow capacity. Extended rear sway bar end links and new bump stops are included to compensate for the lift along with a track bar bracket to recenter the rear axle. As with all Zone Offroad kits these include Factory Protection Plus for a limited lifetime warranty, ESC System compatibility, and 5-year, 100,000-mile drivetrain warranty. Get the look and the ride you are after with this new 4.5" radius arm system from Zone Offroad.

Quick Specs:
  • Front Lift Height: 4.5"
  • Front Lift Method: Coil Springs
  • Rear Lift Height: 2.5"
  • Rear Lift Method: Coil Spacer
  • Install Time Hrs: 7-8
  • Difficulty Level 1-5: 4
  • Wheel Size: 17x9/18x9/20x9
  • Back Spacing: 5.5"
  • Max Tire Size: 37x12.50
  • Wheel Size: 17x9/18x9/20x9
  • Back Spacing: 4.5"
  • Max Tire Size: 35x12.50


  • Heavy duty 1/4" steel, laser cut, internally gusseted radius arms improve strength, offer more ground clearance and correct caster
  • High strength progressive rate front coil springs for a great ride on any terrain
  • F/R HD track bar relocation brackets to correctly position both axles under the truck
  • Forged drop pitman arm to corect steering angles
  • F/R sway bar correction to maintain handling performance
  • HD transmission crossmember and t-case indexing ring to correct front driveline angles
  • Allows clearance for up to 37" tires


  • T-case indexing ring designed for vehicles with 6-bolt design only, will not fit trucks with 8-bolt.
  • Will not fit rear air-ride equipped models
  • Will not fit Power Wagon models
  • Kit designed for diesel models only


2020 Ram 2500 Big Horn 4WD
2020 Ram 2500 Laramie 4WD
2020 Ram 2500 Laramie Longhorn 4WD
2020 Ram 2500 Limited 4WD
2020 Ram 2500 Lone Star 4WD
2020 Ram 2500 Tradesman 4WD
2019 Ram 2500 Big Horn 4WD
2019 Ram 2500 Laramie 4WD
2019 Ram 2500 Laramie Longhorn 4WD
2019 Ram 2500 Limited 4WD
2019 Ram 2500 Lone Star 4WD
2019 Ram 2500 SLT 4WD
2019 Ram 2500 Tradesman 4WD

Install Instructions

For information on how to install your Zone 4.5" Radius Arm Lift LKit | 2019-2020 RAM 2500 4WD Diesel

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About Us
We are dedicated to helping you find the perfect fitment for your ride while also bringing you the highest quality, affordable aftermarket parts in the world! We are truck and car enthusiasts who build their dream rides with these very products.

Shipping times vary depending on item and immediate availability. Many suspension kits will ship out within 3-5 business days while some select items may take up to 7-10 business days. You will receive the tracking information via email as soon as it is available so you can easily track your package(s) from us, to your door. Keep in mind, some suspension components may ship separately and could arrive at different times. All shipping prices are based on the lower 48 states unless specified otherwise. Always inspect your items immediately upon receipt and notify us within 5 business days if there are any concerns, damages, or missing items.

WARNING: This product can expose you to Nickel, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to

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