BDS 5.5-Inch Radius Arm Lift Kit — Ram 2500 SKU: BDS2101FS | Ram 2500 2014–2018 | 4WD | Gas | 5.5" Front / 4" Rear | FOX 2.0 Performance Series | Coil Spring Front and Rear

A complete 5.5-inch radius arm suspension lift kit engineered for the 2014–2018 Ram 2500 gas 4WD. Heavy-duty tubular replacement radius arms mount in the factory location with caster adjustment and OE-style rubber bushings. Gas-specific progressive rate Pro-Ride coil springs provide the 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. Clears up to 37-inch tires.

Before ordering: This kit fits 2014–2018 Ram 2500 gas engine 4WD. Gas engine only — diesel Ram 2500 is not supported. Several trims in the BDS fitment data appear with mixed or "ALL" fuel type entries (R/T, Outdoorsman, Hemi Sport, Sport, SLT HD, Laramie HD, Limited Tungsten, Limited Tungsten HD) — confirm your truck is a gas engine before ordering regardless of trim. Exhaust modification note: 6.4L gas models require exhaust modification to clear the front driveshaft. 5.7L gas models may require it as well. The vehicle can be driven without the front driveshaft to an exhaust shop. Welding equipment is required as a specialty tool for this installation — confirm your installer has welding capability before scheduling. Vehicles with a manual T-case require BDS122422 (sold separately). Vehicles with a 2-piece rear driveshaft (carrier bearing) require BDS122406 (sold separately).

Required separately (conditional):

• BDS122422 — Manual transfer case shifter extension, if equipped with manual T-case
• BDS122406 — Carrier bearing drop, if equipped with 2-piece rear driveshaft (carrier bearing)

Verified Fitment

This kit fits 2014–2018 Ram 2500 gas engine 4WD in the following trim configurations. Gas engine only — diesel is not supported on any trim.

Diesel Ram 2500 is excluded from this kit on all trims and all years.

Component Specifications

Lift Configuration (this SKU):

Pro-Ride Coil Springs — Front:

Pro-Ride Coil Springs — Rear:

HD Radius Arms:

FOX 2.0 Performance Series Shocks (front and rear):

What Is and Is NOT Included

Included — Front:

• Gas-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

Not included (conditional — may be required):

• BDS122422 — Manual transfer case shifter extension (required for manual T-case)
• BDS122406 — Carrier bearing drop (required if equipped with 2-piece rear driveshaft)

Critical Compatibility

• Gas engine only: Gas-specific Pro-Ride coil springs are included. Diesel Ram 2500 is not supported on any trim.
• Exhaust modification — engine-specific: 6.4L gas models require exhaust modification to clear the front driveshaft. 5.7L gas models may require exhaust modification. Confirm your engine and have a plan for exhaust modification before scheduling installation. The vehicle can be driven without the front driveshaft to an exhaust shop.
• Welding equipment required: Welding equipment is listed as a required specialty tool for this installation. Confirm your installer has welding capability before scheduling.
• Trim and fuel type verification: Several trims appear in BDS fitment data with "ALL" fuel type designations. This kit is gas-specific — only gas engine vehicles are supported. Confirm your engine before ordering regardless of trim.
• Manual transfer case: Requires BDS122422 (sold separately).
• 2-piece rear driveshaft: Requires BDS122406 (sold separately).
• Tire fitment: Clears up to 37 x 12.50-inch tires. Minor trimming may be required.
• ADAS recalibration: Required after installation at a qualified dealer or ADAS service center. 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 3 hours. Specialty tools required: step drill bit, drill/bit set, pitman arm puller, and welding equipment. Confirm your installer has welding capability before scheduling.

Exhaust modification: 6.4L gas models require exhaust modification to clear the front driveshaft before reinstallation. 5.7L gas models may require it. The vehicle can be driven without the front driveshaft installed to reach an exhaust shop.

Verify before beginning:

• Engine type (6.4L requires exhaust modification; 5.7L may require it)
• Transfer case type (manual T-case requires BDS122422)
• Rear driveshaft type (2-piece carrier bearing requires BDS122406)
• Installer has welding equipment
• ADAS recalibration appointment scheduled

Professional alignment is required after installation. Refer to the current BDS Suspension installation instructions for SKU BDS2101FS for complete procedures, torque specifications, and component-specific instructions.

The Obsidian Take

The BDS2101FS is the radius arm approach to lifting the 2014–2018 gas Ram 2500 — 5.5 inches of front lift on gas-specific progressive rate coil springs, 4 inches of rear lift also on coil springs, with HD tubular radius arms replacing the factory stamped steel units. The HD radius arms mount in the factory location with caster adjustment and OE-style rubber bushings, which keeps the ride refinement without sacrificing geometry correction at this height. FOX 2.0 Performance Series shocks are application-tuned for this lift. Two things to address before installation day: confirm whether your engine needs exhaust modification (6.4L definitely does; 5.7L may), and confirm your installer has welding equipment — that's listed as a required specialty tool. Buyers in this generation of Ram 2500 should also confirm their drivetrain is gas, as several trims in the BDS data appear with mixed fuel designations.

This Product Is For You If

• You own a 2014–2018 Ram 2500 gas engine 4WD in a verified trim configuration.
• You want a 5.5-inch front and 4-inch rear coil spring lift with HD tubular radius arms.
• You want FOX 2.0 Performance Series shocks with application-specific valving at this lift height.
• You want up to 37-inch tire clearance.
• You are prepared to complete any required exhaust modification for your engine type.
• Your installer has welding equipment on hand.
• You have confirmed your transfer case type and rear driveshaft configuration.

This Product Is Not For You If

• Your Ram 2500 has a diesel engine.
• Your Ram 2500 is 2WD.
• You have not confirmed your engine type or exhaust modification plan.
• Your installer does not have welding equipment.
• You want NX2 Nitro Series shocks — see the NX2 variant of this kit.
• 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 diesel Ram 2500?
No. The Pro-Ride coil springs are gas-specific. Diesel Ram 2500 is not supported.

My trim shows "ALL" in the BDS fuel type column. Does that mean diesel is supported?
No. This kit is gas-specific regardless of how BDS categorizes certain trims in their fitment data. Confirm your engine is a gas engine before ordering.

Does my 5.7L need an exhaust modification?
Possibly. BDS states that 6.4L models require exhaust modification and 5.7L models may require it. Confirm with your installer before scheduling.

Welding equipment is listed as a specialty tool — does that mean cutting or welding the frame?
BDS lists welding equipment as a required specialty tool for this installation. Confirm the specific welding requirement with your installer and the BDS installation instructions before scheduling.

What is the difference between radius arm and 4-Link lift kits?
The radius arm kit uses heavy-duty replacement arms in the factory mounting positions with caster adjustment and rubber bushings. The 4-Link conversion replaces the factory radius arms with a full bracket and control arm system for more aggressive geometry correction. The radius arm kit is rated Moderate and takes approximately 3 hours; the 4-Link conversion is more involved.

Do I need the carrier bearing drop?
Only if your Ram 2500 has a 2-piece rear driveshaft with a carrier bearing. Confirm your driveshaft configuration — if 2-piece, BDS122406 is required.

What tires will fit?
BDS recommends up to 37 x 12.50-inch tires. Recommended wheel and backspace specs are 17 x 8 at 5.625-inch backspace, 18 x 9 at 4.5-inch backspace, or 35 x 12.50 with 17 x 9 at 4.5-inch backspace. Minor trimming may be required.

Does ADAS need to be recalibrated after installation?
Yes. This kit changes vehicle ride height and suspension geometry. 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. Manufacturer specifications and included components 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 is required as a specialty tool for this installation — confirm installer capability before scheduling. Exhaust modification may be required depending on engine type. A professional wheel alignment is required after installation.

Tire Fitment Notice: Up to 37-inch tires are supported with trimming that 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.