BDS Suspension 6" 4-Link Conversion Lift Kit | Diesel Pro-Ride Coils | HD 4-Link Arms | T-Case Indexing Ring | 6" Front / 5" Rear | 2017–2019 Ford F-250 / F-350 Super Duty 4WD Diesel | SKU: BDS1527FS
Verified Fitment This kit fits the 2017 through 2019 Ford F-250 and F-350 Super Duty with 4WD and a diesel engine, SRW configuration only. The F-350 Limited trim (2018–2019) is lis ted in BDS's own fitment table with "ALL" drive type and "ALL" fuel type — confirm your specific Limited configuration before ordering. Year Make Model Submodel Drive Fuel Notes 2017 Ford F-250 Super Duty All 4WD Diesel SRW only 2017 Ford F-350 Super Duty Platinum, Lariat, King Ranch, XL, XLT 4WD Diesel SRW only 2018 Ford F-250 Super Duty All 4WD Diesel SRW only 2018 Ford F-350 Super Duty Platinum, Lariat, King Ranch, XL, XLT 4WD Diesel SRW only 2018 Ford F-350 Super Duty Limited All All Confirm drivetrain and fuel before ordering 2019 Ford F-250 Super Duty All 4WD Diesel SRW only 2019 Ford F-350 Super Duty Platinum, Lariat, King Ranch, XL, XLT 4WD Diesel SRW only 2019 Ford F-350 Super Duty Limited All All Confirm drivetrain and fuel before ordering Before ordering — confirm these four items: SRW — DRW is not compatible Diesel engine — this kit is diesel-specific (Pro-Ride coils are diesel-specific). Gas 6.2L with 6R100 transmission is specifically excluded from the T-Case indexing ring Rear leaf spring count — 2-leaf or 3-leaf main pack (see Field 6) Factory rear sway bar — if equipped, add BDS part 123005 Verify fitment by text: (469) 407-7538 Does NOT Fit Exclusion Reason Notes F-250 / F-350 DRW (Dually) SRW only — confirmed in BDS Important Notes Not applicable 2020+ F-250 / F-350 Different platform — BDS fitment ends at 2019 See BDS 2020+ Super Duty systems 2016 or earlier F-250 / F-350 Different suspension generation See BDS 2011–2016 Super Duty systems Gas-powered F-250 / F-350 Pro-Ride coil springs are diesel-specific — gas trucks require different front coils See BDS gas Super Duty systems 6.2L gas F-350 with 6R100 transmission T-Case indexing ring will NOT fit this transmission/engine combination Gas/6R100 trucks cannot use this kit Manual shift transfer case models Indexing ring not designed for manual shift T-case — modification of shift cable mount required if installed Confirm T-case type before ordering Trucks with 2-piece rear driveshaft without BDS123402 Carrier bearing drop kit BDS123402 may be required for correct driveline angle — without it, rear driveshaft vibration may result Add BDS123402 if equipped with 2-piece rear driveshaft Trucks with factory rear sway bar without adding BDS part 123005 Factory rear sway bar requires an additional relocation component Add part 123005 at checkout if truck has factory rear sway bar Verify fitment by text: (469) 407-7538 Component Specifications Specification Detail SKU BDS1527FS System 6" 4-Link Conversion Lift Kit Front lift height 6 inches — coil spring method Rear lift height 5 inches — block method Front lift method Pro-Ride diesel-specific dual-rate coil springs 4-Link conversion ¼" steel brackets, bolt-on; HD upper and lower control arms; corrects axle positioning; limits caster change through wheel travel Pitman arm Forged drop pitman arm — maintains correct steering angles at 6" lift Track bar bracket Included — corrects track bar angle at lift height T-Case indexing ring Precision-built with ARP studs — clocks transfer case to improve front driveline operating angle; required at 6" lift to use factory front driveshaft Transmission crossmember High-clearance crossmember supplied Sway bar relocation Front sway bar relocation included Brake line brackets Front and rear brake line brackets included Rear components High-strength fabricated lift block (5"), longer U-bolts, brake line brackets Standard shock — NX2 Nitro Nitrogen-charged, twin-tube, 10-stage velocity-sensitive valving, 1-3/8" high-flow piston, self-lubricating seals, dual-welded ends, silver powder coat Shock upgrade option 1 — FOX 2.0 2" IFP aluminum body, CNC 6061-T6 mounting ends, 5/8" chrome alloy shaft, application-specific valving, clear anodized Shock upgrade option 2 — FOX 2.5 2.5" external reservoir aluminum body, 7/8" chrome alloy shaft, DSC Dual Speed Compression Adjuster, serviceable, 1-year manufacturer's warranty Rear lift option 5" block with leaf spring selection — 2-leaf or 3-leaf main pack Tire fitment 38" × 13.5" — 17×9 or 17×10 at 5" backspace, 20×10 at 5" backspace (minor trimming may be required) Installation 100% bolt-on Base price $3,217.45 (NX2 Nitro shocks) What Is and Is NOT Included Included in base kit: Component Diesel-specific Pro-Ride dual-rate front coil springs (pair) 4-Link control arm conversion brackets (¼" steel, bolt-on) HD upper and lower 4-Link control arms Forged drop pitman arm Track bar relocation bracket T-Case indexing ring with ARP studs High-clearance transmission crossmember Front sway bar relocation hardware Front brake line brackets Rear 5" fabricated lift block Longer U-bolts (rear) Rear brake line brackets NX2 Nitro nitrogen-charged shocks (front and rear) — standard option All required hardware and installation components Required add-ons (not in base price — select at checkout or order separately): Item Notes Rear leaf spring selection 2-leaf or 3-leaf main pack must be selected — confirm factory leaf spring count before ordering. Some F250/350 have 2-leaf mains; overload-equipped trucks have 3-leaf mains. Rear sway bar relocation (BDS part 123005) Required only if truck has factory rear sway bar Carrier Bearing Drop Kit (BDS123402) Required if truck has 2-piece rear driveshaft Shock upgrade options (replaces included NX2 Nitro at additional cost): Option Notes FOX 2.0 Performance Series IFP monotube upgrade — application-specific valving, 5/8" shaft, aluminum body FOX 2.5 Performance Elite Series External reservoir, DSC adjuster, 7/8" shaft — maximum off-road performance option Critical Compatibility Condition Interaction Action Required Rear leaf spring count — critical buyer decision BDS confirms some F250/350 trucks have a 2-leaf main rear spring pack; trucks with top overload options have a 3-leaf main. The incorrect leaf spring selection will produce incorrect ride height and handling. Check the factory rear leaf spring pack before ordering — count the number of main leafs and select the matching rear option at checkout. T-Case indexing ring — manual shift transfer case The indexing ring is not designed for manual shift T-case models. If your truck has a manual shift transfer case, modification of the shift cable mount is required before installation. Confirm T-case type (manual or electronic shift) before ordering. T-Case indexing ring — 6.2L gas / 6R100 The indexing ring does not fit the 6.2L gas engine when paired with the 6R100 transmission. Diesel-only application — confirmed. Factory rear sway bar If the truck has a factory rear sway bar, BDS part 123005 must be added. Not including this part with a factory rear sway bar-equipped truck results in incomplete installation. Confirm factory rear sway bar presence and add BDS 123005 at checkout. 2-piece rear driveshaft BDS states a Carrier Bearing Drop Kit (BDS123402) may be required for trucks with a 2-piece rear driveshaft. At 6" of lift, the carrier bearing angle will be out of range without a drop kit. Confirm driveshaft configuration — 1-piece or 2-piece — and add BDS123402 if needed. F-350 Limited — All drivetrain / All fuel BDS's own fitment table lists 2018 and 2019 F-350 Limited with "ALL" drive type and "ALL" fuel type — this may include AWD or gas configurations of the Limited trim. If you have an F-350 Limited, text (469) 407-7538 to confirm your specific drivetrain and engine combination is compatible before ordering. 38" × 13.5" tire fitment BDS confirms fitment for 38" × 13.5" tires with 17×9, 17×10, or 20×10 wheels at 5" backspace. Minor trimming may be required on the 13.5"-wide tires. Confirm wheel backspacing is 5" before ordering if running 38" tires. Installation Notes Skill level: Intermediate to advanced. BDS rates this as a 100% bolt-on system — no cutting or welding required. However, the scope of this installation (4-Link control arm conversion, T-Case indexing, transmission crossmember, front coil springs, rear block, and four shocks) requires a qualified shop with Super Duty lift experience and the correct equipment. T-Case indexing ring: The transfer case must be indexed to allow factory front driveshaft use at 6" of lift. The ARP-stud indexing ring clocks the transfer case for improved front driveline angle. This step requires transfer case removal or in-vehicle installation depending on shop capability. Manual shift T-case trucks require additional modification. Front alignment: A full front-end alignment is mandatory after installation. Post-install alignment torque check: BDS recommends a re-torque of all fasteners and an alignment check after 500–1,000 miles. Required tools (professional shop): Tool Required Vehicle lift rated for F-250/F-350 Yes Torque wrench Yes Full socket and wrench set Yes Spring compressor Yes Transfer case service equipment Yes — for indexing ring Alignment equipment or appointment Yes Common Questions What is a 4-Link conversion and why does this kit include one?The factory 2017–2019 Super Duty uses stamped steel radius arms for front suspension geometry. At 6" of lift, the factory radius arm geometry creates axle positioning errors and caster change through the wheel travel arc. The BDS 4-Link conversion replaces the factory radius arm setup with HD upper and lower control arms on ¼" steel bolt-on brackets, correcting axle positioning and limiting caster change throughout wheel travel. The result is more predictable handling, better stability, and improved steering feel at 6" of lift compared to a coilover-only system using factory radius arms. Why does this kit require transfer case indexing?At 6" of front lift, the front driveshaft operating angle changes enough that the factory driveshaft will not function correctly without indexing the transfer case. The BDS ARP-stud indexing ring physically clocks the transfer case body to improve the front driveline angle, allowing the factory front driveshaft to be retained. If this step is skipped, the front driveshaft will operate outside its designed angle range and vibration or driveshaft damage will result. How do I know if my truck has a 2-leaf or 3-leaf rear main spring pack?Look at the rear leaf spring assembly from underneath the truck — count the number of main leaves (not the helper or overload leaves). Trucks with the overload/top load package have 3-leaf mains. Most standard F250/350s have 2-leaf mains. Selecting the wrong option will result in incorrect rear ride height. Text (469) 407-7538 if unsure. Which shock option should I choose?NX2 Nitro is the base option — correct for on-road and moderate trail use, included in the base price. FOX 2.0 Performance Series upgrades to an IFP monotube shock for better heat management and off-road control. FOX 2.5 Performance Elite adds an external reservoir and DSC adjuster — the correct choice for serious off-road use and maximum adjustability. All three options are custom-tuned for this specific BDS application. Does this fit the F-350 DRW (Dually)?No — BDS confirms in their Important Notes that this kit is SRW models only. What is the warranty?BDS Suspension provides a Limited Lifetime Warranty on their suspension components. Confirm warranty terms at bdssuspension.com. FOX shocks carry a 1-year manufacturer's warranty (FOX 2.5 Performance Elite Series confirmed). The Obsidian Take This kit is for the 2017–2019 F-250 or F-350 Super Duty Diesel SRW owner who wants 6 inches of front lift with a complete geometry correction — not a coilover-only system that leaves the factory radius arms in place. The 4-Link conversion is the defining feature of BDS1527FS: the ¼" bolt-on brackets and HD upper and lower arms correct the axle positioning error that factory radius arms produce at this lift height, and they limit caster change through wheel travel in a way that factory radius arms cannot. At 6", the difference between a proper 4-Link and a radius-arm-only setup is felt in every steering input on and off the road. The T-Case indexing ring is the other component that separates a properly installed 6" Super Duty from a truck that vibrates. At this lift height, the front driveshaft angle requires the transfer case to be clocked — skipping this step produces front driveshaft vibration under load. The kit includes everything needed to do it correctly. There are four things to confirm before ordering: SRW configuration, diesel engine, rear leaf spring count (2-leaf or 3-leaf main), and whether the truck has a factory rear sway bar or a 2-piece rear driveshaft. Each of these requires a different add-on or option selection. Getting them right before checkout prevents a partial installation. It is not for DRW trucks. It is not for gas-powered Super Dutys, particularly the 6.2L with 6R100. And it is not a complete installation without the correct rear leaf spring selection, sway bar add-on if applicable, and carrier bearing drop if the truck has a 2-piece driveshaft. Manufacturer Data Disclaimer Specifications are sourced from BDS Suspension product documentation. Actual specifications, fitment, lift heights, required add-ons, and compatibility may vary by specific vehicle configuration, factory options, transmission type, and manufacturer updates. Confirm all vehicle specifications with BDS Suspension or OFAS before ordering. Non-Returnable Notice Suspension components are non-returnable once installed. Confirm SRW configuration, diesel engine, rear leaf spring count (2-leaf or 3-leaf main), factory rear sway bar presence, driveshaft type (1-piece or 2-piece), and transfer case type (electronic or manual shift) before ordering. Text (469) 407-7538 with any fitment or configuration questions before your order is placed.