BDS 5-Inch 4-Link Coil-Over Conversion | FOX 2.5 Performance Elite | Ford F-250 / F-350 Super Duty SRW 4WD Diesel 2020–2022 | SKU: 1972FPE

Verified Fitment

Component Specifications

What Is and Is NOT Included

Critical Compatibility

SRW vs. DRW and diesel vs. gas are both hard fitment splits on this platform. The 4-link geometry and coil-over spring rate and valving in SKU 1972FPE are engineered specifically for the SRW front suspension geometry and 6.7L Power Stroke diesel weight distribution. Neither variable is interchangeable. Text (469) 407-7538 before ordering if you need help confirming your wheel configuration or engine.

2020–2022 Super Duty Diesel 4-Link Lift Kit Reference

Text (469) 407-7538 to confirm lift height, model, engine, and wheel configuration before ordering.

Installation Notes

Skill Level: Advanced. A 5-inch 4-link coil-over conversion on a Super Duty diesel platform is one of the most involved front suspension jobs available for this truck. The 4-link system replaces the factory radius arm and coil spring setup entirely — replacing both with a true 4-link geometry and FOX 2.5 PE coil-over as an integrated unit. A qualified suspension shop with documented Super Duty experience is required. Do not attempt DIY installation.

Required Tools:

• Full hydraulic lift rated for Super Duty diesel weight
• Coil-over compression tool
• 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 inches of lift, driveshaft angles change significantly from factory. Inspect 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. This inspection is not optional on a diesel platform at 5-inch lift.

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 coil-over failure.

Torque Specs: Follow BDS-specified torque values included in the installation instructions. Do not substitute generic torque values on a Super Duty diesel platform under towing and hauling loads.

Tire Fitment: At 5 inches of front lift on the Super Duty diesel platform, typical fitment runs 37–40-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

The Obsidian Take

SKU 1972FPE is the complete front suspension upgrade for the 2020–2022 F-250 or F-350 SRW 4WD diesel owner who wants 5 inches of front lift with true 4-link geometry correction and FOX 2.5 PE coil-over damping. This is not a radius arm lift with a shock upgrade — it is a full conversion away from the factory radius arm system. The 4-link eliminates radius arm bind that degrades geometry and limits articulation at significant lift heights, replaces it with corrected caster geometry at 5-inch lift, and integrates the FOX 2.5 PE coil-over as the spring and damper in a single engineered unit.

At 5 inches of lift on a diesel Super Duty used for towing and hauling, geometry correction is not optional — it is the foundation of the build. A lifted radius arm system at this height compromises caster, introduces bind under articulation, and accelerates front-end component wear under load. The 4-link addresses all of that. FOX 2.5 PE with external reservoir adds thermal management capacity for sustained towing loads — maintaining consistent damping performance on long hauls under heavy trailer weight where an internal reservoir shock degrades.

The comparison between 1972FPE and 1987FPE is model, wheel configuration, and lift height — not shock tier. Both run FOX 2.5 PE and a true 4-link coil-over conversion. SKU 1972FPE covers F-250 and F-350 SRW at 5 inches. SKU 1987FPE covers F-350 DRW at 6 inches. If your Super Duty is SRW and you want 5 inches, 1972FPE is the correct kit. If it is DRW, stop here and order 1987FPE — the DRW front suspension geometry requires a different conversion entirely.

This kit is for you if: You own a 2020–2022 F-250 or F-350 Super Duty SRW 4WD diesel and want 5 inches of front lift with a complete 4-link coil-over conversion — corrected geometry, eliminated radius arm bind, improved articulation, and FOX 2.5 PE damping tuned for a working diesel SRW platform.

This kit is not for you if: Your Super Duty is DRW — order SKU 1987FPE. Your Super Duty is gas — gas requires a different kit, text OFAS to confirm. Your truck is a 2019 or earlier, a 2023 or newer without confirmation, an F-150, or an F-450/F-550. You want 6 inches on a DRW diesel — order SKU 1987FPE. Confirm your model, engine, wheel configuration, and year before ordering — the kit is non-returnable once installed.

Common Questions

What is the difference between SKU 1972FPE and SKU 1987FPE?
Both kits are 4-link FOX 2.5 PE coil-over conversions for the 2020–2022 Super Duty diesel platform. SKU 1972FPE covers F-250 and F-350 SRW at 5 inches of front lift. SKU 1987FPE covers F-350 DRW at 6 inches of front lift. SRW and DRW have different front suspension geometry — the 4-link conversion components are not interchangeable. Confirm your wheel configuration before ordering.

Why does a 4-link conversion matter at 5 inches on a Super Duty diesel?
At 5 inches of lift, the factory radius arm design introduces caster deviation and bushing bind that degrades geometry consistency, accelerates tire wear, and reduces articulation. A true 4-link system replaces the radius arm geometry entirely — correcting caster at the lifted height, eliminating bind under articulation, and allowing the front suspension to move through its range of motion without the geometric compromises inherent in a lifted radius arm system. On a diesel towing platform at this lift height, that correction is the foundation of a capable build.

Does this fit my 2023 F-250 or F-350?
Not confirmed. Text (469) 407-7538 before ordering a 2023 model year — do not assume compatibility.

Does this kit include rear lift?
No. SKU 1972FPE is a front suspension conversion only. Rear lift components are not included.

Is a driveshaft modification required?
At 5 inches of lift via 4-link conversion, driveshaft angles change 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 coil-overs 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 model, engine, wheel configuration, drivetrain, and year before ordering. Text (469) 407-7538 with any fitment questions before your order is placed.