BDS 4-Inch Radius Arm Lift Kit | FOX 2.5 Performance Elite | Ram 2500 4WD Diesel 2014–2018 | SKU: 1762FPE

The BDS 1762FPE is a 4-inch radius arm front lift kit with FOX 2.5 Performance Elite external reservoir shocks for the 2014–2018 Ram 2500 4WD diesel — the DS-generation platform. Heavy-duty BDS radius arms replace the factory arms, correcting caster at lift height and reducing bushing bind. Diesel-tuned front coil springs deliver 4 inches of lift at the correct spring rate for the diesel engine weight. FOX 2.5 PE external reservoir shocks deliver advanced valving and heat-managed damping for sustained towing and off-road performance at lifted height.

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

First — engine: diesel-tuned coil springs. Ram 2500 gas requires a different kit — order 1763FPE for the 2014–2018 Ram 2500 4WD gas. Gas and diesel springs are not interchangeable.

Second — generation: the 2014–2018 Ram 2500 is the DS platform. The 2019 and newer Ram 2500 is the DT platform — a completely different front suspension architecture. If your Ram 2500 is a 2019 or newer, order 1660FPE. The 2013 and earlier Ram 2500 is not compatible.

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

If you need 6 inches of front lift instead of 4 on the DS diesel platform, order 2100FPE (FOX 2.5 PE) or 2100FS (FOX 2.0). For FOX 2.0 shocks at a lower price point on this same kit, order 1762FS.

Component Specifications

What Is and Is NOT Included

Critical Compatibility

Three fitment confirmations required before ordering.

Want FOX 2.0 instead of FOX 2.5 PE? Order 1762FS.
Want 6 inches instead of 4? Order 2100FPE (FOX 2.5 PE) or 2100FS (FOX 2.0).
Not sure which Ram 2500 generation you have? Text (469) 407-7538 before ordering.

FOX 2.5 PE vs. FOX 2.0 — Which Shock Do You Need?

DS vs. DT Generation Reference — Ram 2500 Diesel

Tire Clearance

At 4 inches of front lift on the 2014–2018 Ram 2500 diesel 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. The radius arm lift on a diesel platform requires a qualified suspension shop with experience on heavy-duty truck platforms. Do not attempt DIY installation.

Full front-end alignment is mandatory after installation. Do not drive on public roads before alignment is completed. Running a lifted diesel truck without post-installation alignment causes accelerated tire wear, steering pull, and handling instability under tow.

Driveline inspection is required after installation. Inspect driveshaft angles and U-joint operating angles after installation. Confirm angles are within acceptable operating range before towing — driveline issues under load on a diesel platform are costly to address after the fact.

External reservoir routing. Follow BDS and FOX installation instructions for reservoir placement. Avoid pinch points, heat sources, and moving components during routing. Improper reservoir placement can damage the reservoir line and void the FOX warranty.

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

FOX shock break-in period. Allow FOX 2.5 PE shocks to complete the manufacturer-recommended break-in period before aggressive off-road or heavy towing use.

Text (469) 407-7538 to confirm engine, platform, and drivetrain before ordering.

The Obsidian Take

The BDS 1762FPE is the correct kit for the 2014–2018 Ram 2500 4WD diesel owner who wants 4 inches of front lift with corrected radius arm geometry and maximum shock performance. The FOX 2.5 PE external reservoir is the reason to choose this kit over 1762FS — the reservoir separates the oil from the nitrogen gas charge, managing heat under sustained off-road terrain and heavy diesel towing loads so damping performance stays consistent where a standard shock body begins to fade. On a diesel platform that regularly sees trailer weight and sustained load cycles, the 2.5 PE earns its price difference on every long tow run.

If your use case is primarily daily driving and moderate occasional towing, FOX 2.0 (1762FS) delivers meaningfully better damping than factory at a lower price point — the external reservoir is more capability than that use case requires.

If your Ram 2500 is gas, diesel-tuned springs are the wrong rate for the lighter gas engine weight — order 1763FPE. If it is a 2019 or newer DT platform, the DS geometry does not apply — order 1660FPE. If you need 6 inches instead of 4, order 2100FPE for FOX 2.5 PE or 2100FS for FOX 2.0. If it is a Ram 3500, this kit does not apply.

DS platform, diesel, 4WD, 4 inches, FOX 2.5 PE — the 1762FPE is the complete, correctly-tuned front-end solution for the Ram 2500 diesel owner who tows hard and wants the damping performance to match every mile of it.

Common Questions

What is the difference between 1762FPE and 1762FS?
Both kits fit the 2014–2018 Ram 2500 4WD diesel and deliver 4 inches of front lift with the same BDS radius arms, diesel-tuned springs, and track bar correction bracket. The only difference is the shock — 1762FPE uses FOX 2.5 PE with external reservoir and advanced valving. 1762FS uses FOX 2.0 without external reservoir at a lower price point. For sustained towing and aggressive off-road use, the 2.5 PE is the correct specification. For daily and moderate use, FOX 2.0 covers the application at lower cost.

Why can't I use this kit on my 2019 Ram 2500?
The 2019 and newer Ram 2500 is the DT platform — completely different front suspension architecture from the 2014–2018 DS platform. The radius arm geometry, spring rates, and correction brackets are not interchangeable between platforms. Order 1660FPE for the DT platform diesel with FOX 2.5 PE.

Why can't I use diesel springs on my gas Ram 2500?
The diesel engine is significantly heavier than the gas engine on the Ram 2500 platform. Front coil springs are tuned for a specific front axle weight — diesel-tuned springs under a gas engine deliver excessive spring rate and harsh ride. Gas springs under a diesel engine sag and compromise geometry under load. Order 1763FPE for the 2014–2018 Ram 2500 4WD gas.

Does this kit lift the rear of the truck?
This kit addresses front lift via the radius arm upgrade. Rear lift components are not included. Confirm rear lift requirements with your installer before ordering if needed.

Is this a DIY install?
No. The radius arm lift on a diesel platform requires a qualified suspension shop. This is not a leveling kit — professional installation is required.

What warranty does this kit carry?
BDS suspension components carry the BDS No-Fine-Print Warranty. FOX 2.5 PE shocks carry a FOX 1-year limited warranty.

Verified Fitment