Apex Chassis KIT373-BLK ProLock Drag Link — 1.75" Black Powdercoat Solid Chromoly Steel | 2017–2026 Ford F-250 / F-350 Super Duty 4WD | P558 & P702 | 2–6" Lift

The drag link your lifted P558 Super Duty has been waiting for.

Ford engineered the P558/P702 drag link for stock ride height. The moment the front suspension drops below that geometry, the OEM drag link angle fights every steering input instead of transferring it cleanly. You're not driving the truck anymore — you're managing it.

The Apex Chassis KIT373-BLK ends that. A 1.75" solid chromoly steel bar with precision clearance bends, black powdercoat finish, and ProLock high-misalignment joints — engineered specifically for the 2017–2026 Ford F-250 and F-350 Super Duty 4WD platform at 2–6" of lift. Built for the geometry your truck is actually running.

Section 1 — Comprehensive Sizing Matrix

Why chromoly steel and not aluminum on the P558/P702 platform: The 2017–2026 Super Duty has significantly tighter clearance tolerances around the front differential cover and track bar brackets than the 2005–2016 generation. The precision clearance bends required to sweep cleanly past those components at every point in the suspension travel are only achievable in chromoly steel — the wall thickness required to maintain the same structural integrity in aluminum makes the clearance geometry physically impossible on this platform.

✅ This unit fits — P558 and P702 standard track 4WD

❌ This unit does NOT fit — read before ordering

P558 vs P221 generation split — critical: The 2017–2026 Super Duty uses completely different steering geometry than the 2005–2016 generation. If your truck is a 2016 or earlier, stop here and see KIT371-BLK.

⚠️ F-350 Wide-Track / Fat Fender owners: The factory wide-track front axle on certain F-350 configurations changes steering geometry lengths. This bar will not center properly on a Wide-Track axle. Confirm standard track width before ordering.

⚠️ BDS Adjustable Trackbar incompatibility: The adjustment collars on the BDS trackbar occupy the exact same physical space as the precision clearance bends on this bar during deep steering cycles. They will bind. Text (469) 407-7538 before ordering — we'll identify the correct configuration for your setup.

⚠️ Fox ATS / Fox TS incompatibility: The Fox ATS and Fox TS clamping-style stabilizers will not clear the heavy-duty bar profile of the KIT373-BLK. Standard Fox 2.0 through-shaft and Carli high-mount setups are confirmed compatible.

Supporting mod requirements:

• Lifts 2–4": Direct replacement. Verify OEM pitman arm compatibility before installing.
• Lifts exceeding 4": Track bar relocation bracket strongly recommended. Verify pitman arm drop compatibility before ordering.

Before You Buy — Questions We Get Asked

Q: Will this fix the bump steer and wander on my lifted 2017–2026 F-250 or F-350?

Yes. By correcting the operational angle of the drag link back into its designed threshold for 2–6" lifts, it removes the feedback loop causing steering wander and bump steer on the P558/P702 platform. A full alignment after installation is required to complete the correction. If your tie rod is also OEM, consider the KIT375-BLK complete kit — correcting the drag link without addressing the tie rod leaves a partial fix.

Q: My 2022 F-350 is a dually — does this fit?

No. The KIT373-BLK fits F-350 SRW standard track width only. Dually and Wide-Track F-350 models have a wider front axle that changes steering geometry lengths and is not compatible with this unit.

Q: Why can't I run this with my BDS adjustable trackbar or Fox ATS/TS stabilizer?

The BDS trackbar adjustment collars physically occupy the same space as the precision clearance bends during deep steering cycles — they will bind. The Fox ATS/TS clamping profile conflicts with the bar geometry. Both are hard incompatibilities, not preferences. Text (469) 407-7538 with your full suspension mod list and we'll identify the correct configuration before you order.

Q: How is this different from KIT371-BLK?

KIT371-BLK is engineered for the 2005–2016 P221 Super Duty platform using 2" solid 7075-T6 aluminum. This unit is engineered for the 2017–2026 P558/P702 platform using 1.75" solid chromoly steel with platform-specific clearance bends. Different generations, different geometry, different materials. The right unit depends entirely on your year.

The Obsidian Take

The KIT373-BLK is the right call for the 2017–2026 Super Duty owner who lifted the truck and immediately felt the OEM drag link fighting the suspension instead of working with it. The 1.75" solid chromoly steel construction with precision clearance bends is the only way to achieve the correct geometry on the P558/P702 platform — the tighter clearance tolerances around the differential cover and track bar brackets make aluminum physically incompatible on this generation. The ProLock system locks adjustment settings against trail vibration and sustained towing loads. The black powdercoat seals the steel against road salt and moisture year-round. At 22 lbs it's a direct swap, one alignment appointment, and the wander problem is resolved.

If your tie rod is also OEM or showing wear, the KIT375-BLK complete master kit is the smarter purchase — both components corrected in one session with one alignment fee. This drag link alone is the right call only if the tie rod has already been upgraded or is confirmed in good condition. If you're running a BDS adjustable trackbar or Fox ATS/TS stabilizer, stop and text us before ordering — both are hard incompatibilities we verify manually. If your truck is a 2016 or earlier, this unit will not fit your P221 steering geometry — see KIT371-BLK.

Product information is compiled from manufacturer-provided data. Obsidian Forged Auto Supply is not responsible for manufacturer-driven specification updates, metadata changes, or accuracy discrepancies in the foundational data sheets.

2017–2026 Ford F-250 / F-350 Super Duty 4WD. P558 & P702. Standard track only. 2–6" lift. Does NOT fit 2005–2016 — see KIT371-BLK. BDS trackbar and Fox ATS/TS users text us first.