BDS 5.5-Inch 4-Link Lift Kit | Rear Air Ride | FOX 2.0 Shocks | Ram 2500 4WD Gas 2019–2026 | SKU: 1739FS

The BDS 1739FS is a 5.5-inch 4-link front lift kit with FOX 2.0 Performance Series shocks for the 2019–2026 Ram 2500 4WD gas equipped with factory rear air ride suspension. This is a true 4-link conversion — not a radius arm upgrade, not a leveling kit. The 4-link geometry corrects factory radius arm bind, improves articulation, and delivers 5.5 inches of front lift with gas-tuned coil springs. The included air ride-specific rear brackets preserve the factory load-leveling function at lifted height.

This kit has four hard fitment splits before it applies to your truck.

First — rear suspension: factory rear air ride only. If your Ram 2500 does NOT have factory rear air ride, order 1681FS (5.5-inch radius arm, FOX 2.0) or 1699FS (4-inch radius arm, FOX 2.0). Installing this kit on a non-air-ride truck adds brackets with nothing to connect to.

Second — generation: the 2019–2026 Ram 2500 is the DT platform. The 2014–2018 Ram 2500 with factory air ride requires 1630FS — different platform, different geometry.

Third — engine: gas-tuned coil springs. Ram 2500 diesel requires a different kit — gas and diesel springs are not interchangeable.

Fourth — drivetrain: 4WD only. Ram 2500 2WD is not compatible.

Text (469) 407-7538 to confirm all four before the order ships.

Component Specifications

What Is and Is NOT Included

Critical Compatibility

Four fitment confirmations required before ordering.

Not sure about rear suspension type, generation, or engine? Text (469) 407-7538 before ordering.

2019–2026 Ram 2500 Gas Air Ride Lift Kit Variant Reference

How to Confirm Factory Rear Air Ride on Your Ram 2500

Check your window sticker or build sheet for "Rear Air Suspension" or "Active-Level Four-Corner Air Suspension." Visually, the factory air ride system uses air bags at the rear axle with an onboard compressor — distinguishable from conventional leaf springs on inspection. Text (469) 407-7538 with your VIN if you need confirmation before ordering.

Tire Clearance

At 5.5 inches of front lift on the 2019–2026 Ram 2500 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.

Installation Notes

Professional installation is required — 4-link conversion and Ram air ride experience mandatory. A 4-link conversion with factory air ride integration requires a qualified suspension shop experienced with both Ram 2500 4-link systems and Ram air ride systems. The combination adds complexity beyond either system in isolation. Do not attempt DIY installation.

Full front-end alignment is mandatory after installation. Do not drive on public roads before alignment is completed.

Factory air ride system verification is mandatory after installation. Verify that the factory air ride load-leveling function operates correctly at lifted height. If the air ride system does not function correctly, do not drive — return to your installer to verify bracket installation per BDS instructions before road use.

Driveline inspection is required after installation. Inspect driveshaft angles and U-joint operating angles after the 4-link conversion is installed. Confirm angles are within acceptable operating range before towing.

Torque all fasteners to BDS specification. Torque specs are included in the BDS installation instructions. Do not estimate torque values on a 2500-class platform.

FOX shock break-in period. Allow FOX 2.0 shocks to complete the manufacturer-recommended break-in period before aggressive off-road or heavy towing use.

Text (469) 407-7538 to confirm air ride configuration, generation, engine, and drivetrain before ordering.

The Obsidian Take

The BDS 1739FS is the correct kit for the 2019–2026 Ram 2500 4WD gas owner who has factory rear air ride and wants 5.5 inches of front lift via a true 4-link conversion — with the load-leveling system intact. The 4-link conversion addresses the front geometry at the source, eliminating the radius arm bind that limits the factory suspension, while the air ride-specific brackets keep the rear system functional at lifted height.

The distinction between this kit and 1681FS matters beyond just the rear suspension hardware. 1681FS uses a radius arm upgrade to deliver 5.5 inches of lift. This kit uses a 4-link conversion — a more involved front suspension change that corrects geometry more completely and improves articulation. If your Ram 2500 has factory air ride and you want the 4-link architecture at 5.5 inches, 1739FS is the only kit that delivers both.

If your Ram 2500 does not have factory rear air ride, order 1681FS for the radius arm system at 5.5 inches or 1699FS for 4 inches. If your Ram 2500 is a 2014–2018 DS platform with air ride, order 1630FS. If it is diesel, gas-tuned springs are the wrong rate for the diesel engine weight.

The air ride brackets in this kit are what keep the load-leveling system working after the lift. If your truck has that system and you want 5.5 inches of front lift via a true 4-link conversion, the 1739FS is the complete, platform-correct solution.

Common Questions

How do I confirm my Ram 2500 has factory rear air ride?
Check your window sticker or build sheet for "Rear Air Suspension" or "Active-Level Four-Corner Air Suspension." Text (469) 407-7538 with your VIN and we will confirm before your order ships.

What is the difference between 1739FS and 1681FS?
Both kits deliver 5.5 inches of front lift on the 2019–2026 Ram 2500 4WD gas. 1739FS is for trucks with factory rear air ride — includes air ride brackets and uses a 4-link conversion for front geometry. 1681FS is for trucks without factory rear air ride — uses a radius arm upgrade. The front suspension architecture differs between the two.

What is the difference between a 4-link conversion and a radius arm upgrade?
A radius arm upgrade replaces the factory radius arms with heavy-duty BDS arms, correcting caster and reducing bushing bind at lifted height. A 4-link conversion replaces the entire front suspension link geometry with a 4-link system — more complete geometry correction, improved articulation, and eliminated radius arm bind. Both deliver 5.5 inches of lift; the 4-link is a more thorough geometry solution.

What happens if my air ride doesn't work correctly after installation?
Do not drive the truck. Return to your installer to verify the air ride brackets are installed correctly per BDS instructions before road use.

Does this kit lift the rear of the truck?
This kit addresses front lift via the 4-link conversion. The factory rear air ride system handles rear suspension at lifted height via the included air ride-specific integration brackets. Confirm rear ride height expectations with your installer before ordering.

Is this a DIY install?
No. A 4-link conversion combined with Ram air ride integration requires a qualified suspension shop. Professional installation is required.

What warranty does this kit carry?
BDS suspension components carry the BDS No-Fine-Print Warranty. FOX 2.0 shocks carry a FOX 1-year limited warranty.

Verified Fitment