BDS 4-Inch 4-Link Lift Kit | FOX 2.5 Performance Elite Shocks | Ram 3500 4WD Gas 2019–2026 | With Factory Rear Overload Leaf | SKU: 1679FPE

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.

Reservoir Routing: Follow BDS and FOX installation instructions for FOX 2.5 PE external reservoir placement. Avoid pinch points and heat sources. Incorrect routing causes premature shock failure.

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 1679FPE is the premium tier in the BDS 4-link lineup 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 options — corrected caster, eliminated radius arm bind, improved front axle articulation. FOX 2.5 Performance Elite with external reservoir is the only variable that separates 1679FPE from 1679FS and 1679H, and it is the variable that matters most under sustained load.

The FOX 2.5 PE external reservoir adds fluid volume and thermal dissipation capacity beyond what an internal reservoir shock can sustain under extended use. On a Ram 3500 used for towing at or near platform capacity — long hauls, heavy trailers, sustained grades — the internal reservoir shock eventually heats to the point where damping consistency degrades. The external reservoir extends the thermal ceiling significantly. Advanced valving in the 2.5 PE delivers more precise damping response across a wider range of inputs — empty, loaded, off-road, or on-road — than either the FOX 2.0 or the NX2 Nitro can match.

The decision to step from 1679FS to 1679FPE is the correct call for any Ram 3500 owner who works this truck to its capacity regularly. If you pull heavy equipment trailers, run this truck loaded on long hauls, or want the top damping tier available for this application regardless of use case — 1679FPE is the correct choice. If your towing profile is light to moderate and the FOX 2.0 Performance Series meets your load requirements, 1679FS delivers the same geometry at a lower 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 you want FOX 2.5 Performance Elite damping with external reservoir — the top shock tier available for this system and the correct choice for sustained heavy towing and maximum thermal management.

This kit is not for you if: Your Ram 3500 does not have the factory rear overload leaf — order SKU 1677FPE. 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. The FOX 2.0 Performance Series meets your towing profile and budget — order SKU 1679FS. Confirm your rear suspension configuration before ordering — the kit is non-returnable once installed.

Common Questions

What is the difference between SKU 1679FPE, SKU 1679FS, and SKU 1679H?
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 at or near Ram 3500 capacity regularly or want maximum thermal management, 1679FPE is the correct choice. TEXT (469) 407-7538 to confirm which shock tier fits your use case.

What is the difference between SKU 1679FPE and SKU 1677FPE?
Rear suspension configuration. Both kits run FOX 2.5 Performance Elite on the 2019–2026 Ram 3500 4WD gas platform. SKU 1679FPE is for trucks with the factory rear overload leaf spring. SKU 1677FPE 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.

Why does the FOX 2.5 PE external reservoir on a Ram 3500 towing platform?
The external reservoir increases total fluid volume and thermal dissipation capacity beyond what an internal reservoir shock body can sustain under extended towing loads. On long hauls under heavy trailer weight, an internal reservoir shock heats progressively — the external reservoir extends the thermal ceiling and maintains consistent damping performance throughout. For sustained heavy towing on a Ram 3500, this is not a minor spec difference.

Does this fit my Ram 3500 diesel?
No. SKU 1679FPE 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 1679FPE is a front lift system only. The factory rear overload leaf suspension remains in place — rear lift components are not included.

What warranty covers this kit?
BDS suspension components are covered by the BDS No-Fine-Print Warranty. FOX 2.5 Performance Elite 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.