Apex Chassis ProLock Drag Link | 2" Polished 7075-T6 Aluminum | 2005-2016 Ford F-250/F-350 Super Duty 4WD | SKU KIT371-POL
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Before ordering, verify your vehicle details, current setup, and SKU with OFAS fitment support so your upgrade matches your build.
Shipping & Delivery
Free shipping is available within the lower 48 U.S. states. Large or heavy items may ship by freight, and delivery timing can vary by warehouse, carrier, and product availability.
Fitment, Shipping & Product Support
The Apex Chassis ProLock Drag Link (KIT371-POL) is a direct-replacement extreme-duty drag link for the 2005–2016 Ford F-250/F-350 Super Duty 4WD (excludes wide track). 2" polished 7075-T6 aircraft-grade aluminum adjusting rod with raw mirror polish finish, SAE 1045 CNC-machined forged steel housings, SAE 4140 hot-forged induction heat-treated chromoly ball studs, ProLock™ machined keyway washers, jam nuts with 3 wrench-flat set screws, reversible stainless steel taper sleeve for drag link flip applications. 2–6" lift range. Full front-end alignment required post-install.
Mechanically identical to KIT371-BLK — same 2" 7075-T6 rod, same ProLock system, same 22 lbs. The only difference is finish. Drag link only — tie rod sold separately as KIT372-POL. Complete master kit KIT374-POL bundles both for one installation and one alignment fee.
No polished aluminum version exists for the 2017+ P558/P702 platform. If your truck is 2017 or newer, KIT373-BLK is the correct and only drag link available from Apex.
Component Specifications
| Spec | Detail |
|---|---|
| SKU / Part Number | KIT371-POL |
| Brand | Apex Chassis |
| Platform | 2005–2016 Ford F-250/F-350 Super Duty 4WD |
| Component | Drag link only — tie rod sold separately (KIT372-POL) |
| Complete Kit | KIT374-POL — drag link + tie rod bundled |
| Black Version | KIT371-BLK — mechanically identical, black anodized finish |
| Adjusting Rod | 2" solid 7075-T6 aircraft-grade aluminum |
| Housings | SAE 1045 solid steel forged — CNC machined |
| Ball Studs | SAE 4140 hot-forged chromoly — induction heat treated, rolled step threads |
| Adjustment System | ProLock™ machined keyway washers + jam nuts with 3 wrench-flat set screws |
| Joint Type | High-misalignment ends |
| Stabilizer Mount | Straight-bored with reversible stainless steel taper sleeve — supports drag link flip without losing stabilizer mount point |
| Bearings | Rugged metal-to-metal |
| Boots | CR rubber accordion boots |
| Hardware | Grade 8 / Class 10.9 — castle nut at high-vibration load points |
| Lubrication | Pre-threaded Zerk housing, greaseable, pre-greased, gull-winged grease grooves |
| Finish | Raw highly polished mirror aluminum |
| Lift Range | 2–6" |
| Weight | 22 lbs |
| Wide Track | Not compatible |
| 2005–2007 Model Years | Fits, but requires lower steering stabilizer mount or dual stabilizer kit |
| BDS Adjustable Trackbar | Not compatible — adjuster sleeve contacts drag link during steering cycling |
| Fox ATS / Fox TS Stabilizers | Not compatible — use OE-style Fox (985-24-001) or Carli instead |
| High Mount Stabilizer | Must mount in OE position at taper hole on pitman arm side drag link end |
| Dual Stabilizer Kits | May require tie rod end bracket modification — tie rod ends are 1/8" larger in diameter than OE |
| Alignment Required | Yes — full front-end alignment mandatory post-install |
| Install Difficulty | Intermediate — professional alignment required |
| Warranty | Apex Chassis manufacturer limited warranty — 90-day registration required for coverage beyond initial period |
| Country of Origin | United States |
| Sold As | Each — drag link only |
What Is and Is NOT Included
| Item | Included |
|---|---|
| 2" polished 7075-T6 aluminum drag link assembly | ✓ |
| ProLock washers and proprietary jam nuts with set screws | ✓ |
| Reversible stainless steel taper sleeve | ✓ |
| Grade 8 / Class 10.9 hardware | ✓ |
| Installation sheet with torque specs | ✓ |
| Tie rod | ✗ NOT included — sold separately as KIT372-POL |
| Steering stabilizer | ✗ NOT included — confirm OE-position compatibility with your existing stabilizer |
| Track bar relocation bracket | ✗ NOT included — recommended for lifts exceeding 4" |
| Dropped pitman arm | ✗ NOT included — may be required for lifts exceeding 4" |
KIT371-POL vs. KIT371-BLK — Finish Only
| SKU | Adjusting Rod | Finish | Notes |
|---|---|---|---|
| KIT371-POL (this listing) | 2" 7075-T6 aluminum | Raw mirror polished | Show-quality finish; develops natural patina over time, restores with aluminum polish |
| KIT371-BLK | 2" 7075-T6 aluminum | Black anodized | Zero-maintenance finish — better corrosion protection for road-salt environments |
Same rod material, same ProLock system, same weight, same fitment. Choose based on finish standard and maintenance preference.
Drag Link Only vs. Complete Master Kit
| SKU | Contents | Best For |
|---|---|---|
| KIT371-POL (this listing) | Drag link only | Tie rod already upgraded or confirmed in good condition |
| KIT372-POL | Tie rod only | Drag link already upgraded or confirmed in good condition |
| KIT374-POL | Drag link + tie rod bundled | Both components need replacement — one install, one alignment |
2005–2016 P221 vs. 2017+ P558/P702 — Why No Polished Option for the Newer Trucks
Ford completely redesigned the Super Duty steering geometry between 2016 and 2017. The P558/P702 platform has significantly tighter clearance tolerances that required Apex to engineer a slim-profile solid chromoly steel construction — making a polished aluminum version geometrically incompatible for that generation. KIT373-BLK in black powdercoat chromoly steel is the only drag link Apex makes for the 2017+ platform. If your truck is 2017 or newer, stop here and see KIT373-BLK.
Verified Fitment — 2005–2016 Ford F-250/F-350 Super Duty 4WD
| Vehicle | Years | Status |
|---|---|---|
| Ford F-250 Super Duty 4WD — standard track | 2005–2016 | ✓ — excludes wide track |
| Ford F-350 Super Duty 4WD — standard track SRW | 2005–2016 | ✓ — excludes wide track |
| Ford F-250/F-350 Super Duty — wide track | 2005–2016 | ✗ Not compatible |
| Ford F-250/F-350 Super Duty — 2WD | Any | ✗ No solid front axle or drag link on 2WD |
| Ford F-250/F-350 Super Duty P558/P702 | 2017–2026 | ✗ Different geometry — order KIT373-BLK; no polished version available for this platform |
| Ford F-450/F-550 | Any | ✗ Different platform |
| Ford F-150 / GM / Ram / Toyota | Any | ✗ Not compatible |
Critical Compatibility
| Configuration | Notes |
|---|---|
| Wide track Super Duty | Not compatible — confirm standard track before ordering |
| 2005–2007 model years | Fits, but requires lower steering stabilizer mount or dual stabilizer kit |
| BDS Adjustable Trackbar | Not compatible — adjuster sleeve contacts drag link during steering cycling |
| Fox ATS / Fox TS stabilizers | Not compatible — use OE-style Fox (985-24-001) or Carli instead |
| Dual steering stabilizer kits | May require modification to tie rod end brackets due to 1/8" larger OE diameter |
| 2017+ Super Duty | Does not fit — completely different steering geometry; no polished Apex option exists for this platform |
| Lifts exceeding 4" | Track bar relocation bracket strongly recommended; verify pitman arm drop compatibility |
Common Questions
What's the difference between KIT371-POL and KIT371-BLK?
Finish only. Same 2" 7075-T6 aluminum rod, same ProLock system, same high-misalignment joints, same reversible taper sleeve, same 22 lbs. POL is raw mirror-polished aluminum — show-quality finish that develops a natural patina and restores with standard aluminum polish. BLK is black anodized — zero maintenance, better corrosion protection for year-round road-salt environments.
Does a polished version exist for the 2017–2026 Super Duty?
No. The tighter clearance tolerances on the P558/P702 platform required a slim-profile solid chromoly steel construction. The wall thickness required for an equivalent aluminum bar is geometrically incompatible on this platform. KIT373-BLK in black powdercoat chromoly is the only option for 2017+ trucks.
My truck is a 2006 — is there anything extra I need?
Yes. 2005–2007 trucks require either a lower steering stabilizer mount or a dual stabilizer kit — stabilizer mounting position differs from the 2008+ trucks this drag link was primarily engineered around.
Can I flip this drag link on a high-clearance lift setup?
Yes. The straight-bored stabilizer hole and included reversible stainless steel taper sleeve allow you to flip the link geometry at the pitman arm without losing the stabilizer mounting point. No fabrication required.
The Obsidian Take
The KIT371-POL is for the P221 Super Duty owner who built the truck to a standard and wants every component to reflect it. Mechanically identical to the KIT371-BLK — same 2" 7075-T6 construction, same ProLock adjustment retention, same reversible taper sleeve for flip applications. The polished finish is raw buffed aluminum that retains its luster and restores with a pass of polish when needed.
If zero maintenance matters more than mirror finish, the KIT371-BLK is the call. For 2017+ Super Duty owners, no polished option from Apex exists — KIT373-BLK is the only path. If your tie rod is also OEM, the KIT374-POL complete master kit corrects both in one session with one alignment fee.
Non-Returnable Notice: Steering components that have been installed are non-returnable. Confirm wide track status, trackbar compatibility, and model year before ordering.
Manufacturer Data Disclaimer: Specifications sourced from Apex Chassis's own product page and authorized distributor documentation. "Internal Flopper Stoppers" and "anti-shear stabilizer stud" claims present in input data are not confirmed by any authorized Apex source and have been removed. Reversible stainless steel taper sleeve is the confirmed stabilizer mount feature per Apex Chassis's own product page. Obsidian Forged Auto Supply is an authorized Apex Chassis dealer. Product registration within 90 days required for full warranty coverage. Manufacturer specifications are subject to change without notice.