BDS 6-Inch 4-Link Lift Conversion Kit — Ford F-250/F-350 Super Duty SKU: BDS1527FS | Ford F-250/F-350 Super Duty 2017–2019 | 4WD | Diesel | SRW | 6" Front / 5" Rear | FOX 2.0 Performance Series | 5-Inch Block with 2-Leaf Main

A complete 6-inch 4-Link suspension lift kit engineered for the 2017–2019 Ford F-250 and F-350 Super Duty diesel 4WD SRW. The 4-Link conversion replaces the factory stamped steel radius arms with a high-strength ¼-inch steel bracket system and HD upper and lower control arms to correct axle positioning and limit caster change throughout wheel travel. Diesel-specific Pro-Ride dual-rate coil springs provide a 6-inch front lift. A precision transfer case indexing ring and high-clearance transmission crossmember address driveline geometry at this lift height. Five-inch rear lift via high-strength fabricated steel block. FOX 2.0 Performance Series shocks front and rear. Clears up to 38-inch tires. 100% bolt-on.

Before ordering: This kit fits 2017–2019 Ford F-250 and F-350 Super Duty 4WD diesel SRW (Single Rear Wheel) models only. Dual rear wheel models are excluded. The transfer case indexing ring does not fit 6.2L vehicles equipped with the 6R100 transmission. The indexing ring is not designed for manual shift transfer cases — modification of the shift cable mount would be required. Verify your rear spring pack leaf count before ordering: some models have a 2-leaf main rear spring pack; others have a 3-leaf main. This listing is the 2-leaf main configuration — order the 3-leaf block option if your truck has a 3-leaf main. The 2018–2019 F-350 Limited trim appears in BDS fitment data across all drive types and fuel types — confirm compatibility with BDS before ordering if your Limited is not a 4WD diesel. If your truck has a 2-piece rear driveshaft, a Carrier Bearing Drop Kit (BDS123402) may be required. If your truck has a factory rear sway bar, add PN 123005 — not included.

Required separately (conditional):

• Carrier Bearing Drop Kit BDS123402 — if equipped with 2-piece rear driveshaft
• Rear sway bar relocation kit PN 123005 — if equipped with factory rear sway bar

Verified Fitment

Excluded: Dual rear wheel (DRW) models. 6.2L vehicles with 6R100 transmission. Manual shift transfer case models.

Component Specifications

Lift Configuration (this SKU):

Pro-Ride Coil Springs:

4-Link Control Arm Conversion:

FOX 2.0 Performance Series Shocks (front and rear):

Rear Lift Block:

What Is and Is NOT Included

Included — Front:

• Diesel-specific Pro-Ride dual-rate coil springs (pair)
• 4-Link control arm conversion brackets (high-strength ¼-inch steel)
• HD upper and lower control arms
• Forged drop pitman arm
• Track bar relocation bracket
• Sway bar relocation hardware
• Brake line brackets
• Transfer case indexing ring with ARP studs
• High-clearance transmission crossmember
• FOX 2.0 Performance Series front shocks

Included — Rear:

• High-strength fabricated 5-inch lift block (2-leaf main configuration)
• Extended U-bolts
• Brake line brackets
• FOX 2.0 Performance Series rear shocks

Not included (conditional — may be required):

• Carrier Bearing Drop Kit BDS123402 — required if equipped with 2-piece rear driveshaft
• Rear sway bar relocation kit PN 123005 — required if equipped with factory rear sway bar

Critical Compatibility

• SRW models only: This kit is not designed for dual rear wheel (DRW) F-250 or F-350 Super Duty models.
• Diesel 4WD only: The Pro-Ride coil springs are diesel-specific. Gas engine and 2WD models are not supported.
• 6.2L / 6R100 transmission exclusion: The transfer case indexing ring will not fit 6.2L vehicles equipped with the 6R100 transmission.
• Manual shift transfer case: The indexing ring is not designed for manual shift transfer case models. Modification of the shift cable mount would be required.
• Rear spring pack verification required: This kit is the 2-leaf main configuration. Verify your truck's rear leaf spring count before ordering. Order the 3-leaf main variant if your truck has a 3-leaf rear pack.
• 2-piece rear driveshaft: Carrier Bearing Drop Kit BDS123402 may be required. Confirm your driveshaft configuration before ordering.
• Factory rear sway bar: If factory-equipped with a rear sway bar, add PN 123005 — not included.
• Tire fitment: Clears up to 38 x 13.50-inch tires. Minor trimming may be required.
• 2018–2019 F-350 Limited: BDS fitment data lists this trim across all drive types and fuel types. Confirm with BDS before ordering if your Limited is not a diesel 4WD.
• ADAS recalibration: Required after installation. All 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. Specialty tools required: 30mm socket, drill/bit set, and pitman arm puller. All components are 100% bolt-on. Professional alignment is required after installation.

Verify before beginning:

• Rear spring pack leaf count (2-leaf vs. 3-leaf main)
• Presence of a 2-piece rear driveshaft (may require BDS123402)
• Presence of factory rear sway bar (requires PN 123005)
• Transfer case type (manual shift requires modification)
• Transmission type (6.2L with 6R100 is excluded)
• ADAS recalibration appointment scheduled

Refer to the current BDS Suspension installation instructions for SKU BDS1527FS for complete procedures, torque specifications, and component-specific instructions.

The Obsidian Take

The BDS1527FS is a purpose-built 4-Link lift for the 2017–2019 F-250/F-350 Super Duty diesel — not a coil spacer, not a leveling kit. The 4-Link conversion addresses what the factory stamped steel radius arms cannot: axle positioning control and caster management throughout wheel travel. At 6 inches of front lift, driveline geometry requires the precision transfer case indexing ring and high-clearance crossmember that BDS includes in this kit. FOX 2.0 Performance Series shocks provide the off-road damping that matches this lift height. The result is a truck that clears 38-inch tires, maintains controlled handling, and does it with a bolt-on installation. Two non-negotiable pre-order checks: verify your rear spring leaf count (2-leaf vs. 3-leaf) and check for a 2-piece driveshaft. Miss either and the kit won't configure correctly before it arrives.

This Product Is For You If

• You own a 2017–2019 Ford F-250 or F-350 Super Duty in a 4WD diesel SRW configuration with a 2-leaf main rear spring pack.
• You want a 6-inch 4-Link lift that corrects suspension geometry rather than simply adding height.
• You want FOX 2.0 Performance Series shocks with application-specific valving at this lift height.
• You want up to 38-inch tire clearance with a 100% bolt-on installation.
• You are prepared to have ADAS sensors professionally recalibrated after installation.
• You have confirmed your transfer case type and rear driveshaft configuration before ordering.

This Product Is Not For You If

• Your truck is a dual rear wheel (DRW) model.
• Your truck has a gasoline engine or is 2WD.
• Your truck has a 6.2L engine with the 6R100 transmission.
• Your truck has a manual shift transfer case and you are not prepared to modify the shift cable mount.
• Your rear spring pack is a 3-leaf main — see the 3-leaf main rear block variant.
• 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

Is this kit compatible with DRW (dually) models?
No. SRW (Single Rear Wheel) models only.

Does this work with the gas engine?
No. The Pro-Ride coil springs are diesel-specific. This kit does not support gas engine configurations.

Do I need to verify my rear spring pack before ordering?
Yes. This is a critical pre-order check. This kit is the 2-leaf main configuration. Order the 3-leaf main variant if your truck has a 3-leaf rear pack.

What is the transfer case indexing ring and why is it needed?
At 6 inches of lift, the front driveshaft operating angle requires the transfer case to be clocked to maintain factory driveshaft use. The precision-built indexing ring with ARP studs performs this adjustment. It does not fit 6.2L vehicles with the 6R100 transmission and is not designed for manual shift transfer cases.

Do I need the Carrier Bearing Drop Kit?
Only if your truck has a 2-piece rear driveshaft. Confirm your driveshaft configuration — if 2-piece, BDS123402 is required.

My truck has a factory rear sway bar. What do I need?
Add PN 123005. It is not included in this kit.

What tires will fit?
BDS recommends up to 38 x 13.50-inch tires with 17 x 9, 17 x 10, or 20 x 10 wheels at 5-inch backspace. Minor trimming may be required at 38 inches.

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.

How long does installation take?
BDS rates this as a Difficult installation at an estimated 8–10 hours. Specialty tools required: 30mm socket, drill/bit set, and pitman arm puller.

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. This kit is rated Difficult with an estimated installation time of 8–10 hours. A professional wheel alignment is required after installation.

Tire Fitment Notice: 38 x 13.50-inch tires may require minor trimming. 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.