BDS 4-Inch 4-Link Lift Kit | FOX 2.0 Performance Series Shocks | Ram 3500 4WD Gas 2019–2026 | With Factory Rear Overload Leaf | SKU: 1679FS

Verified Fitment

Component Specifications

What Is and Is NOT Included

Critical Compatibility

Factory rear overload leaf, no overload leaf, and factory air ride are three separate hard fitment splits on the Ram 3500 platform. Confirm your rear suspension configuration before ordering. Contact OFAS at (469) 407-7538 before ordering if you are unsure whether your Ram 3500 has the factory rear overload leaf spring, no overload leaf, or factory air ride.

2019–2026 Ram 3500 4WD Gas 4-Inch 4-Link Shock Tier Reference

Contact OFAS at (469) 407-7538 to confirm rear suspension configuration and shock tier before ordering.

Installation Notes

Skill Level: Advanced. A 4-link front suspension conversion on the Ram 3500 platform is a significant suspension job — not a bolt-on leveling kit. The 4-link system replaces the factory radius arm geometry entirely. A qualified suspension shop with documented Ram HD experience is required. Do not attempt DIY installation.

Required Tools:

• Full hydraulic lift rated for Ram 3500 weight
• Torque wrench
• Full socket and wrench set
• Alignment equipment or alignment shop scheduled before driving post-install

Alignment: Full front-end alignment is mandatory after installation. Do not operate the vehicle on public roads before alignment is completed.

Driveline Inspection: At 4 inches of lift via 4-link conversion, confirm driveshaft angles and U-joint operating angles after installation. Driveshaft modification may be required depending on your specific truck's configuration — confirm with your installer before the job begins.

Break-In Period: Allow FOX 2.0 Performance Series shocks to complete the FOX-recommended break-in period before aggressive off-road use.

Torque Specs: Follow BDS-specified torque values included in the installation instructions. Do not substitute generic torque values on a Ram HD platform under towing and hauling loads.

Tire Fitment: At 4 inches of front lift on the Ram 3500 gas platform, typical fitment runs 35–37-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

The Obsidian Take

SKU 1679FS is the mid-tier entry into the BDS 4-link system for the 2019–2026 Ram 3500 4WD gas owner with the factory rear overload leaf spring. The 4-link conversion geometry is identical across all three shock tiers in this lineup — corrected caster, eliminated radius arm bind, improved front axle articulation, consistent suspension performance under Ram 3500 towing and hauling loads. FOX 2.0 Performance Series is the only variable between 1679FS and its entry and premium counterparts.

The FOX 2.0 Performance Series is a genuine upgrade over the NX2 Nitro entry tier. It delivers improved damping valving, better heat resistance under sustained load, and a more refined ride quality — meaningful differences on a Ram 3500 used for towing and hauling. If you work this truck regularly, the FOX 2.0 is the correct minimum shock tier for this application. The NX2 Nitro in 1679H handles lighter-duty use and daily driving, but the FOX 2.0 is the correct choice the moment towing and sustained off-road use enter the equation.

The decision between 1679FS and 1679FPE is thermal management and valving depth. FOX 2.5 PE adds external reservoir capacity and advanced valving — meaningful advantages under maximum towing loads and sustained off-road use at the limits of the Ram 3500 platform. If you pull heavy weight at or near Ram 3500 capacity regularly, the 2.5 PE is worth the step up. For most Ram 3500 gas owners running moderate to heavy towing cycles, 1679FS delivers the right balance of FOX damping quality and price point.

This kit is for you if: You own a 2019–2026 Ram 3500 4WD gas with the factory rear overload leaf spring, you want 4 inches of front lift with a true 4-link conversion, and FOX 2.0 Performance Series is the correct shock tier for your towing and use profile.

This kit is not for you if: Your Ram 3500 does not have the factory rear overload leaf — order SKU 1677FS. Your Ram 3500 has factory rear air ride — order SKU 1723FS. Your Ram 3500 is diesel — contact OFAS for the correct diesel SKU. Your truck is 2WD, a 2018 or earlier, a Ram 2500, or a Ram 1500. You want the entry-level price point — order SKU 1679H. You tow at maximum Ram 3500 capacity regularly and want external reservoir damping — order SKU 1679FPE. Confirm your rear suspension configuration before ordering — the kit is non-returnable once installed.

Common Questions

What is the difference between SKU 1679FS, SKU 1679H, and SKU 1679FPE?
All three kits fit the 2019–2026 Ram 3500 4WD gas with factory rear overload leaf and deliver the same 4-inch front lift via the same 4-link conversion geometry. The only difference is the shock tier — 1679H uses NX2 Nitro entry-level shocks, 1679FS uses FOX 2.0 Performance Series, and 1679FPE uses FOX 2.5 Performance Elite with external reservoir. If you tow regularly or want FOX 2.0 as your minimum damping tier, 1679FS is the correct choice. TEXT (469) 407-7538 to confirm which shock tier fits your use case.

What is the difference between SKU 1679FS and SKU 1677FS?
Rear suspension configuration. Both kits run FOX 2.0 Performance Series on the 2019–2026 Ram 3500 4WD gas platform. SKU 1679FS is for trucks with the factory rear overload leaf spring. SKU 1677FS is for trucks without the factory rear overload leaf. Confirm your rear suspension configuration before ordering — this is a hard fitment split and a non-returnable error if ordered incorrectly.

How do I confirm if my Ram 3500 has the factory rear overload leaf spring?
The factory rear overload leaf is a supplemental leaf spring mounted above or below the main leaf pack — visible upon inspection of the rear suspension. If you are unsure, have a shop inspect the rear suspension before ordering, or contact OFAS at (469) 407-7538 and we will help you confirm before your order ships.

Does this fit my Ram 3500 diesel?
No. SKU 1679FS is for the Ram 3500 4WD gas platform only. The diesel Ram 3500 requires a different kit with different front coil spring tuning. Contact OFAS at (469) 407-7538 to confirm the correct diesel SKU.

Does this kit include rear lift?
No. SKU 1679FS is a front lift system only. The factory rear overload leaf suspension remains in place — rear lift components are not included.

Is a driveshaft modification required?
At 4 inches of lift via 4-link conversion, driveshaft angles change from factory. Whether modification is required depends on your specific truck's configuration — confirm with your installer before the job begins.

What warranty covers this kit?
BDS suspension components are covered by the BDS No-Fine-Print Warranty. FOX 2.0 Performance Series shocks carry a FOX 1-year limited warranty.

Manufacturer Data Disclaimer: Specifications sourced from BDS Suspension product documentation and authorized distributor data. Obsidian Forged Auto Supply is an authorized BDS Suspension dealer. Manufacturer specifications are subject to change without notice.

⚠️ California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information visit P65Warnings.ca.gov.

⚠️ Non-Returnable Notice: Suspension components are non-returnable once installed. Confirm engine, drivetrain, year, and rear suspension configuration before ordering. TEXT (469) 407-7538 with any fitment questions before your order is placed.