BDS 5.5-Inch Radius Arm Lift Kit | FOX 2.5 Performance Elite | Ram 2500 4WD Gas 2019–2026 | SKU: 1681FPE
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Shipping & Delivery
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Fitment, Shipping & Product Support
Here is the full Blueprint execution for SKU 1681FPE.
BDS 5.5-Inch Radius Arm Lift Kit | FOX 2.5 Performance Elite | Ram 2500 4WD Gas 2019–2026 | SKU: 1681FPE
Verified Fitment
| Year Range | Make | Model | Drivetrain | Engine | Rear Suspension |
|---|---|---|---|---|---|
| 2019–2026 | Ram | 2500 | 4WD | Gas only | Without factory rear air ride |
Component Specifications
| Specification | Detail |
|---|---|
| SKU | 1681FPE |
| Brand | BDS Suspension |
| Lift Height | 5.5 inches (front) |
| Suspension Type | Radius arm upgrade — heavy-duty BDS arms |
| Front Coil Springs | Gas-tuned — engineered for Ram 2500 gas platform weight |
| Shock Model | FOX 2.5 Performance Elite — external reservoir |
| Track Bar | Track bar correction bracket — included |
| Fuel Type | Gas only |
| Drivetrain | 4WD only |
| Application | Ram 2500 4WD Gas 2019–2026 — without factory rear air ride |
| Warranty | BDS No-Fine-Print Warranty + FOX 1-year limited warranty |
What Is and Is NOT Included
| Included | Not Included |
|---|---|
| Heavy-duty BDS radius arms — pair | Rear lift components |
| Gas-tuned front coil springs | Alignment — required post-install, buyer's responsibility |
| FOX 2.5 Performance Elite shocks — external reservoir | Extended brake lines if required by installer |
| Track bar correction bracket | Driveshaft modification if required by installer |
| All required installation hardware | Wheels or tires |
| BDS installation instructions |
Critical Compatibility
| Configuration | Compatibility |
|---|---|
| 2019–2026 Ram 2500 4WD Gas — without factory rear air ride | ✅ Correct application |
| 2019–2026 Ram 2500 4WD Gas — with factory rear air ride | ❌ Different kit required — contact OFAS before ordering |
| 2019–2026 Ram 2500 4WD Diesel | ❌ Wrong kit — order SKU 1680FPE |
| 2019–2026 Ram 2500 2WD | ❌ Not compatible — 4WD only |
| 2014–2018 Ram 2500 4WD Gas | ❌ Different platform — order SKU 1763FPE |
| 2018 and earlier Ram 2500 — any configuration | ❌ Different platform — kit does not apply |
| Ram 3500 — any configuration | ❌ Not compatible |
| Ram 1500 — any configuration | ❌ Not compatible |
Factory rear air ride is a hard fitment split on this platform. A Ram 2500 equipped with factory rear air suspension requires a different kit. Confirm your rear suspension configuration before ordering. Contact OFAS at (469) 407-7538 if you are unsure whether your Ram 2500 has factory rear air ride.
2019–2026 Ram 2500 Gas 5.5-Inch Kit Shock Tier Reference
| SKU | Shock Model | Reservoir | Tier |
|---|---|---|---|
| 1681FS | FOX 2.0 Performance Series | Internal | Standard |
| 1681FPE | FOX 2.5 Performance Elite — this listing | External | Premium |
Both kits deliver the same 5.5 inches of front lift with heavy-duty BDS radius arms and gas-tuned coil springs on the 2019–2026 Ram 2500 4WD gas platform. The shock tier is the only variable. Contact OFAS at (469) 407-7538 to confirm which shock tier is correct for your use case before ordering.
Installation Notes
Skill Level: Advanced. A radius arm lift on the 2019–2026 Ram 2500 platform is a significant suspension job — not a bolt-on leveling kit. Heavy-duty BDS radius arms replace the factory arms entirely. A qualified suspension shop with documented Ram HD experience is required. Do not attempt DIY installation.
Required Tools:
- Full hydraulic lift rated for Ram 2500 weight
- Torque wrench
- Full socket and wrench set
- Alignment equipment or alignment shop scheduled before driving post-install
Alignment: Full front-end alignment is mandatory after installation. Do not operate the vehicle on public roads before alignment is completed.
Driveline Inspection: At 5.5 inches of lift, inspect driveshaft angles and U-joint operating angles after installation. Driveshaft modification may be required depending on your specific truck's configuration — confirm with your installer before the job begins.
Reservoir Routing: Follow BDS and FOX installation instructions for FOX 2.5 PE external reservoir placement. Avoid pinch points and heat sources. Incorrect routing causes premature shock failure.
Torque Specs: Follow BDS-specified torque values included in the installation instructions. Do not substitute generic torque values on a Ram HD platform under towing and hauling loads.
The Obsidian Take
SKU 1681FPE is the correct kit for the 2019–2026 Ram 2500 4WD gas owner who wants 5.5 inches of front lift with genuine geometry correction and FOX 2.5 Performance Elite damping. The heavy-duty BDS radius arms are not an accessory upgrade — they replace the factory radius arms entirely, correcting caster angle, reducing bushing bind under articulation and load, and maintaining consistent suspension geometry at the lifted height. Gas-tuned coil springs are engineered specifically for the Ram 2500 gas platform's front-end weight distribution — not shared springs from a diesel application.
The decision between 1681FPE and 1681FS is the shock tier only. Same radius arms, same coil springs, same 5.5-inch lift geometry. FOX 2.5 PE delivers external reservoir thermal management, larger piston diameter, and more refined damping valving under sustained load. If you tow at or near Ram 2500 capacity regularly, wheel this truck aggressively off-road, or want the top damping tier available for this system — 1681FPE is the correct choice. If the FOX 2.0 Performance Series meets your use case and budget, 1681FS delivers the same lift geometry at a lower price point.
This kit is for you if: You own a 2019–2026 Ram 2500 4WD gas without factory rear air ride and want 5.5 inches of front lift with geometry-correct radius arms, gas-tuned coil springs, and FOX 2.5 PE damping with external reservoir.
This kit is not for you if: Your Ram 2500 has factory rear air ride — different kit required. Your Ram 2500 is diesel — order SKU 1680FPE. Your Ram is a 2018 or earlier — order SKU 1763FPE for the 2014–2018 gas application. Your truck is a Ram 3500, Ram 1500, or 2WD. Confirm your engine, drivetrain, and rear suspension configuration before ordering — the kit is non-returnable once installed.
Common Questions
What is the difference between SKU 1681FPE and SKU 1681FS?
Both kits fit the 2019–2026 Ram 2500 4WD gas without factory rear air ride and deliver 5.5 inches of front lift with heavy-duty BDS radius arms and gas-tuned coil springs. The only difference is the shock tier — 1681FPE uses FOX 2.5 Performance Elite with external reservoir and 1681FS uses FOX 2.0 Performance Series. If you tow at capacity regularly or want the top damping tier, order 1681FPE. Call (469) 407-7538 to confirm which fits your use case.
What is the difference between SKU 1681FPE and SKU 1680FPE?
Engine. SKU 1681FPE is for the 2019–2026 Ram 2500 4WD gas platform. SKU 1680FPE is for the 2019–2026 Ram 2500 4WD diesel platform. The gas and diesel Ram 2500 have different front-end weight distribution — the coil springs are tuned specifically for each engine. Ordering the wrong engine application is a non-returnable error.
How do I know if my Ram 2500 has factory rear air ride?
Check your original window sticker or RPO codes. Factory rear air suspension is a dealer-installed option on the 2019–2026 Ram 2500 — it is not standard equipment on all builds. If you are unsure, contact OFAS at (469) 407-7538 and we will help you confirm before your order ships.
Does this kit include rear lift?
No. SKU 1681FPE is a front lift system only. Rear lift components are not included.
Is a driveshaft modification required?
At 5.5 inches of lift, driveshaft angle changes from factory. Whether modification is required depends on your specific truck's configuration — confirm with your installer before the job begins.
What warranty covers this kit?
BDS suspension components are covered by the BDS No-Fine-Print Warranty. FOX 2.5 Performance Elite shocks carry a FOX 1-year limited warranty.
Manufacturer Data Disclaimer: Specifications sourced from BDS Suspension product documentation and authorized distributor data. Obsidian Forged Auto Supply is an authorized BDS Suspension dealer. Manufacturer specifications are subject to change without notice.
⚠️ California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information visit P65Warnings.ca.gov.
⚠️ Non-Returnable Notice: Suspension components are non-returnable once installed. Confirm engine, drivetrain, year, and rear suspension configuration before ordering. Call (469) 407-7538 with any fitment questions before your order is placed.