BDS 6-Inch Radius Arm Lift Kit | Rear Air Ride | FOX 2.0 Shocks | Ram 3500 4WD Diesel 2013-2018

BDS 6-Inch Radius Arm Lift Kit | Rear Air Ride | FOX 2.0 Performance Series Shocks | Ram 3500 4WD Diesel 2013–2018 | With Factory Rear Air Ride | SKU: BDS2106FS

The BDS 6-Inch Radius Arm Lift Kit (SKU: BDS2106FS) is a complete 6-inch front lift system for 2013–2018 Ram 3500 4WD diesel models equipped with the factory rear air ride suspension system, paired with FOX 2.0 Performance Series shocks. This kit is engineered specifically for Ram 3500 trucks with factory rear air ride — it includes air ride-specific rear brackets that integrate with the factory air ride system and preserve load-leveling functionality at lifted height. If your Ram 3500 does not have factory rear air ride, order BDS2104FPE (FOX 2.5 PE) instead. Using the standard kit on a Ram 3500 with factory air ride will result in rear suspension incompatibility.

Verified Fitment (OFAS Standard)

• Ram 3500 4WD Diesel: 2013–2018 — with factory rear air ride suspension

Does NOT fit: Ram 3500 without factory rear air ride — order BDS2104FPE for standard suspension. Does not fit Ram 3500 gas. Does not fit Ram 3500 2WD. Does not fit Ram 3500 2019 or newer — different platform. Does not fit Ram 3500 2012 or earlier. Does not fit Ram 2500. Confirm model year, drivetrain, engine, and rear suspension type (air ride vs. standard leaf) before ordering.

Factory Rear Air Ride — Critical Fitment Gate

The factory rear air ride suspension system on select 2013–2018 Ram 3500 models uses air bags and load-leveling components that require specific lift kit brackets to function correctly at lifted height. This kit (BDS2106FS) includes those air ride-specific brackets. The standard 6-inch kit (BDS2104FPE) does not include air ride brackets and is not compatible with the factory air ride system.

• With factory rear air ride (BDS2106FS, this listing): Includes air ride-specific rear brackets — preserves load-leveling functionality at lifted height
• Without factory rear air ride — standard suspension (BDS2104FPE): Standard 6-inch radius arm kit for Ram 3500 4WD diesel 2013–2018 without air ride

Confirm whether your Ram 3500 has the factory rear air ride suspension before ordering. Contact OFAS at 903-347-3875 to verify your configuration.

Two Critical Fitment Gates

• 4WD only: Does not fit 2WD models.
• Diesel only: Diesel-tuned coil springs for diesel front-end weight. Does not fit gas models.

Radius Arm Upgrade at 6-Inch Lift — Why It Matters

• Heavy-duty BDS radius arms: Replace factory radius arms with BDS-engineered heavy-duty arms for 6-inch lift height, larger tires, and diesel work truck loads
• Caster correction: Maintains proper caster angle at 6-inch lift height
• Reduced bushing bind: Improved arm geometry reduces bind under articulation and load
• Diesel front-end weight: Geometry correction especially critical on the diesel platform at 6-inch lift height
• Track bar correction: Maintains proper axle centering at lifted height

FOX 2.0 Performance Series Shocks

• Improved damping: Significantly improved damping over factory shocks at lifted height
• Heat resistance: 2.0-inch shock body for improved heat dissipation during extended towing
• Ride quality: Tuned for Ram 3500 4WD diesel platform
• FOX warranty: 1-year limited warranty

What’s Included

• Heavy-duty BDS radius arms — pair
• Diesel-tuned front coil springs
• Rear air ride-specific brackets
• FOX 2.0 Performance Series shocks
• Track bar correction bracket
• All required hardware and installation hardware

Technical Specifications

• SKU: BDS2106FS
• Brand: BDS Suspension
• Lift Height: 6 inches (front)
• Suspension Type: Radius arm upgrade — heavy-duty BDS arms
• Rear: Air ride-specific brackets — preserves factory load-leveling functionality
• Shocks: FOX 2.0 Performance Series
• Application: Ram 3500 4WD Diesel 2013–2018 — with factory rear air ride
• Warranty: BDS No-Fine-Print Warranty + FOX 1-year limited warranty on shocks

Installation Notes

• Professional installation required: 6-inch radius arm lift with air ride integration requires professional installation by a qualified suspension shop familiar with air ride systems.
• Alignment mandatory: Full front-end alignment required after installation. Do not drive on public roads before alignment is completed.
• Air ride system verification: Verify factory air ride system function after installation. Contact OFAS at 903-347-3875 if air ride load-leveling does not function correctly after installation.
• Driveline inspection: At 6-inch lift height, inspect driveshaft angles and U-joint operating angles after installation.
• Torque specs: All fasteners must be torqued to BDS specifications per installation instructions.
• Tire sizing: Contact OFAS at 903-347-3875 to confirm maximum tire size before ordering wheels and tires.

Installation Warning

Professional installation required. Air ride system verification required after installation. Alignment mandatory. Driveline inspection required at 6-inch lift. Does not fit standard suspension — order BDS2104FPE for non-air-ride. Does not fit gas, 2WD, 2012 or earlier, or 2019 or newer Ram 3500.

Have you confirmed your Ram 3500 is a 2013–2018 4WD diesel with factory rear air ride — no air ride? Order BDS2104FPE. Contact OFAS at 903-347-3875 to verify your rear suspension configuration before ordering.