BDS 6-Inch Radius Arm Lift Kit — Ram 2500 SKU: BDS2100FS | Ram 2500 2014–2018 | 4WD | Diesel | 6" Front / 4" Rear | FOX 2.0 Performance Series | Coil Spring Front and Rear

A complete 6-inch radius arm suspension lift kit engineered for the 2014–2018 Ram 2500 diesel 4WD. Heavy-duty tubular replacement radius arms mount in the factory location with caster adjustment and OE-style rubber bushings. Diesel-specific progressive rate Pro-Ride coil springs provide the 6-inch front lift. A precision transfer case indexing ring and high-clearance transmission crossmember address driveline geometry at this lift height. The rear uses progressive rate Pro-Ride coil springs for a 4-inch rear lift, with a track bar relocation bracket, bump stop extensions, and sway bar links. FOX 2.0 Performance Series shocks front and rear. Supports up to 37-inch tires.

Before ordering: Diesel 4WD only. This kit is rated Moderate — confirm installer has a drill/bit set and welding equipment before scheduling.

Verified Fitment

Component Specifications

Lift Configuration (this SKU):

HD Radius Arms:

Pro-Ride Coil Springs — Front:

Pro-Ride Coil Springs — Rear:

FOX 2.0 Performance Series Shocks (front and rear):

Recommended Tire and Wheel Configurations (trimming may be required):

What Is and Is NOT Included

Included — Front:

• Diesel-specific progressive rate Pro-Ride coil springs (pair)
• HD tubular radius arms (pair)
• Forged drop pitman arm
• Track bar relocation bracket
• Sway bar correction hardware
• Bump stops
• Brake line brackets
• Transfer case indexing ring
• High-clearance transmission crossmember
• FOX 2.0 Performance Series front shocks

Included — Rear:

• Progressive rate Pro-Ride coil springs (pair)
• Track bar relocation bracket
• Bump stop extensions
• Sway bar links
• FOX 2.0 Performance Series rear shocks

Critical Compatibility

• Diesel only: Diesel-specific Pro-Ride coil springs are included. Gas engine Ram 2500 is not supported — see BDS2101FS for the gas radius arm kit on the same generation.
• Coil spring front and rear: Both the front (6-inch) and rear (4-inch) use progressive rate Pro-Ride coil springs.
• T-case indexing ring and crossmember included: At 6 inches of front lift, the T-case indexing ring and high-clearance transmission crossmember are required for factory front driveshaft use. Both are included.
• Welding equipment required: Drill/bit set and welding equipment are required specialty tools. Confirm installer capability before scheduling.
• ADAS recalibration: Required after installation. All recalibration costs are the owner's responsibility.

Installation Notes

Professional installation is strongly recommended. This kit is rated Moderate with an estimated installation time of 6–8 hours. Specialty tools required: drill/bit set, pitman arm puller, and welding equipment.

Refer to the current BDS Suspension installation instructions for SKU BDS2100FS for complete procedures, torque specifications, and component-specific instructions. Professional alignment is required after installation.

The Obsidian Take

The BDS2100FS is the diesel counterpart to BDS2101FS (gas) for the 2014–2018 Ram 2500 — same radius arm approach, same coil spring front and rear, same FOX 2.0 shocks, same 6–8 hour Moderate installation. Diesel-specific Pro-Ride coil springs replace the gas-specific units. The T-case indexing ring and crossmember handle driveline geometry at 6 inches and are included in the kit. Welding equipment and a drill are on the tool list — confirm installer capability before scheduling.

This Product Is For You If

• You own a 2014–2018 Ram 2500 diesel 4WD in a verified trim configuration.
• You want 6 inches of front lift and 4 inches of rear lift on coil springs via HD radius arms.
• You want FOX 2.0 Performance Series shocks with application-specific valving.
• You want up to 37-inch tire clearance.
• Your installer has welding equipment and a drill.
• You are prepared to have ADAS sensors professionally recalibrated after installation.

This Product Is Not For You If

• Your Ram 2500 has a gas engine — see BDS2101FS.
• Your Ram 2500 is 2WD.
• Your installer does not have welding equipment.
• You want NX2 Nitro Series shocks — see the NX2 variant.
• You want FOX 2.5 Performance Elite Series shocks — see the FOX 2.5 variant.

Product Family Reference

Common Questions

Does this kit fit the gas Ram 2500?
No. Diesel-specific Pro-Ride coil springs are included. For the gas version on the same platform, see BDS2101FS.

What is the difference between BDS2100FS and BDS2101FS?
Fuel type and front lift height. BDS2100FS is diesel with 6 inches of front lift. BDS2101FS is gas with 5.5 inches of front lift. Both use coil springs front and rear and FOX 2.0 shocks on the 2014–2018 Ram 2500.

What tires will fit?
BDS-referenced configurations: 37 x 12.50 on 17 x 8 at 5.625-inch backspace; 37 x 12.50 on 18 x 9 at 4.5-inch backspace; 35 x 12.50 on 17 x 9 at 4.5-inch backspace. Trimming may be required.

Does ADAS need to be recalibrated after installation?
Yes. All ADAS sensors require professional recalibration after installation. All recalibration costs are the owner's responsibility.

Manufacturer Data Disclaimer

Fitment, specification, included-component, and installation data for this kit are sourced from BDS Suspension manufacturer documentation and OFAS-verified product data current as of publication. Specifications are subject to change without notice; confirm current documentation for this SKU at the time of purchase.

Required Legal, Warning, Fitment, and Return Notices

ADAS Recalibration Warning: This kit alters vehicle ride height and suspension geometry. All advanced driver assistance system (ADAS) sensors require professional recalibration after installation. Schedule recalibration at an authorized dealer or certified ADAS service center. All recalibration costs are the owner's responsibility.

Installation Warning: Professional installation is strongly recommended. Welding equipment and a drill/bit set are required specialty tools. A professional wheel alignment is required after installation.

Tire Fitment Notice: BDS references configurations up to 37 x 12.50-inch tires. Trimming may be required. Buyer is responsible for verifying tire and wheel clearance for their specific vehicle and build.

California Proposition 65 Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Return Policy: All returns require prior authorization from Obsidian Forged Auto Supply — do not ship any product back without a Return Merchandise Authorization (RMA). To request an RMA, contact OFAS at Support@obsidianforgedautosupply.com or 469-407-7538 (Monday–Friday 9am–5pm CST, Saturday 9am–3pm CST) with your order number, product SKU, return reason, and photos. Return requests must be submitted within 90 days of delivery. To qualify, the product must be new, unused, uninstalled, complete with all hardware and included components, and in original manufacturer packaging. Do not write on, tape to, or place shipping labels directly on the manufacturer's product box. Return shipping is the customer's responsibility in all cases. Non-defective returns may be subject to a 15% restocking fee. No restocking fee applies when OFAS shipped the wrong item or the return is due to a verified defect or approved damage claim. Some products — including special-order, electrical, and installed items — may be non-returnable. Return eligibility is also subject to applicable manufacturer and supplier return requirements. Approved refunds are issued to the original payment method within approximately 10 business days of the warehouse receiving and processing the returned product. For damaged, missing, or incorrect shipments, contact OFAS within 48 hours of delivery, retain all packaging, and do not install the product.