BDS 6-Inch Radius Arm Lift Kit — Ram 2500 SKU: BDS1680FS | Ram 2500 2019–2024 | 4WD | Diesel | 6" Front / 4.5" Rear | FOX 2.0 Performance Series | Coil Spring Front and Rear

A complete 6-inch radius arm suspension lift kit engineered for the 2019–2024 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 4.5-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: This kit will not fit Ram 2500 models with factory air ride suspension — confirm your truck does not have the factory air ride package before ordering. Diesel 4WD only. This kit is rated Difficult — confirm your installer's experience level 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 relocation hardware
• 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

This kit will not fit:

• Ram 2500 with factory air ride suspension
• Gas engine models
• 2WD models

Critical Compatibility

• Air ride: This kit will not fit Ram 2500 models equipped with factory air ride suspension. Confirm your suspension type before ordering.
• Diesel only: Diesel-specific Pro-Ride coil springs are included. Gas engine Ram 2500 is not supported — see BDS1699FS for the gas radius arm kit at 4 inches, or BDS1681FS for the gas radius arm kit at 5.5 inches.
• Coil spring front and rear: Both the front (6-inch) and rear (4.5-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.
• Difficulty rated Difficult: Confirm installer experience level before scheduling. Refer to BDS installation instructions for SKU BDS1680FS for complete tool requirements.
• 2023–2024 Rebel: Listed with all drive types in BDS fitment data. Diesel engine required regardless of drive type designation.
• ADAS recalibration: Required after installation. All recalibration costs are the owner's responsibility.

Installation Notes

Professional installation is strongly recommended. This kit is rated Difficult with an estimated installation time of 8–10 hours. Refer to the current BDS Suspension installation instructions for SKU BDS1680FS for complete tool requirements, procedures, and torque specifications.

Verify before beginning:

• Confirm truck does not have factory air ride suspension
• Confirm diesel engine
• ADAS recalibration appointment scheduled

Professional alignment is required after installation.

The Obsidian Take

The BDS1680FS is the diesel counterpart to the gas radius arm kits on this platform — 6 inches of front lift on diesel-specific Pro-Ride coil springs, 4.5 inches of rear lift also on coil springs, with the same HD tubular radius arm approach proven across the BDS lineup. The T-case indexing ring and crossmember are included; BDS has addressed the driveline angle requirements at 6 inches. The air ride check is the one pre-order confirmation this kit requires — factory air ride Ram 2500 owners need a different solution; this kit is for standard suspension diesel 4WD trucks only. The Difficult rating means this one is best left to an experienced installer.

This Product Is For You If

• You own a 2019–2024 Ram 2500 diesel 4WD in a verified trim without factory air ride suspension.
• You want 6 inches of front lift and 4.5 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 37-inch tire clearance.
• Your installer is experienced with Difficult-rated installations.
• You are prepared to have ADAS sensors professionally recalibrated after installation.

This Product Is Not For You If

• Your Ram 2500 has factory air ride suspension.
• Your Ram 2500 has a gas engine — see BDS1681FS (5.5-inch gas) or BDS1699FS (4-inch gas).
• Your Ram 2500 is 2WD.
• 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.
• You need less lift — see BDS1660FS for the 4-inch diesel radius arm kit.

Product Family Reference

Common Questions

Does this kit fit Ram 2500 trucks with factory air ride?
No. This kit will not fit models equipped with the factory air ride suspension package.

Does this kit fit the gas Ram 2500?
No. Diesel-specific Pro-Ride coil springs are included. For gas engine models, see BDS1699FS (4-inch) or BDS1681FS (5.5-inch).

What is the difference between BDS1680FS and BDS1660FS?
Lift height and difficulty. BDS1680FS delivers 6 inches of front lift and 4.5 inches of rear lift at Difficult. BDS1660FS delivers 4 inches of front lift and 2.5 inches of rear lift at Moderate. Both are diesel, both fit 2019–2024 Ram 2500 4WD without air ride.

What tires will fit?
BDS-referenced configurations: 37 x 12.50 on 20 x 9 at 4.5-inch backspace; 37 x 13.50 on 18 x 9 at 5.625-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. 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

Fitment Notice: This kit will not fit Ram 2500 models with factory air ride suspension. Diesel 4WD only.

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. This kit is rated Difficult. A professional wheel alignment is required after installation. Refer to BDS Suspension installation instructions for complete tool requirements.

Tire Fitment Notice: BDS references configurations up to 37 x 13.50-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.