Apex Chassis ProLock Drag Link Kit — Ford F-250/F-350 Super Duty (7075-T6 Black Aluminum) SKU: KIT371-BLK
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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
Verified Fitment
| Make | Model | Model Years | Drivetrain | Exclusion |
|---|---|---|---|---|
| Ford | F-250 Super Duty | 2005–2016 | 4WD | Wide-track configurations not compatible |
| Ford | F-350 Super Duty | 2005–2016 | 4WD | Wide-track configurations not compatible |
This kit is not compatible with wide-track axle configurations. Confirm your axle is a standard-track unit before ordering.
Component Specifications
| Attribute | Specification |
|---|---|
| Brand | Apex Chassis |
| SKU | KIT371-BLK |
| Adjusting rod material | 2" 7075-T6 Aluminum |
| Adjusting rod finish | Black powder coat |
| Housing material | SAE 1045 Solid Steel, forged, CNC machined |
| Ball stud material | SAE 4140 Chromoly, hot forged, induction heat treated |
| Ball stud threads | Rolled and step-threaded |
| Bearing type | Metal-to-metal |
| Boot material | CR rubber, accordion style |
| Hardware | Grade 8 / Class 10.9; castle nut |
| Locking system | ProLock Link Connect System — machined keyway on rod end threads paired with precision-cut keyway washer; jam nut with integrated set screws |
| Zerk fittings | Included, pre-threaded; kit pre-greased |
| Grease grooves | Gull-winged design for improved lubrication distribution |
| Reversible drag link | Yes — stainless steel taper sleeve allows stabilizer mounting from either side |
| Adjusting sleeves | Made in the USA |
| Warranty | Apex Honor System — lifetime of vehicle (original purchaser, registration required) |
What Is and Is NOT Included
Included:
- Complete ProLock Drag Link assembly
- 2" 7075-T6 black aluminum adjusting rod
- Drag link ends with ProLock keyway machined into threads
- ProLock keyway washers
- Jam nuts with integrated set screws
- Reversible stainless steel taper sleeve
- Grade 8 / Class 10.9 hardware, castle nuts
- Zerk fittings (pre-threaded, pre-greased)
Not included:
- Replacement set screws (sold separately, part number XP172)
- Steering stabilizer (sold separately; see Critical Compatibility for compatible options)
Critical Compatibility
- Wide track: This kit is NOT compatible with wide-track axle configurations. Confirm standard-track before ordering.
- BDS Adjustable Trackbar: This drag link is NOT compatible with the BDS Adjustable Trackbar. The adjuster sleeve on the BDS unit will contact the Apex drag link during operation.
- Steering stabilizer mounting: High-mount steering stabilizers must be mounted in the OE position at the taper hole in the pitman-arm-side drag link end. Apex recommends OE-style stabilizers, including Fox Part 985-24-001 and Carli. Through-shaft stabilizers such as the Fox ATS are not recommended.
- Lifted trucks: A numeric lift-height range is not published by Apex for this kit. On modified-height trucks, confirm steering geometry, drag-link adjustment, stabilizer position, and all clearance requirements during professional installation and alignment.
- Minimum engagement mark: The drag link end threads include a minimum engagement mark. If that mark is visible, thread engagement is below the safe minimum. Adjust the sleeve position between the two ends or address lift height as required.
Installation Notes
- The ProLock keyway washer must be correctly engaged with the machined keyway on the drag link end thread before the jam nut and set screws are secured.
- Observe the minimum engagement mark on the drag link end threads during adjustment. If the mark is visible, thread engagement is insufficient — redistribute the adjusting sleeve or address the application as required.
- In lifted applications where the pitman arm end is inverted, the included reversible stainless steel taper sleeve allows steering stabilizer mounting from either side of the drag link end.
- Full installation guidance is available from Apex Chassis for this application.
The Obsidian Take
The KIT371-BLK replaces the factory Ford F-250/F-350 Super Duty drag link with a forged SAE 1045 steel housing, SAE 4140 chromoly ball studs, and a 2" 7075-T6 black aluminum adjusting rod, assembled around Apex's ProLock system. The ProLock system uses a machined keyway, keyway washer, and a jam nut with integrated set screws, designed to help secure the drag-link connection against the loosening that is common in OE and conventional aftermarket drag links. The reversible design and included stainless taper sleeve address steering stabilizer mounting on lifted trucks. Two hard stops before ordering: this kit is not compatible with wide-track axles, and it is not compatible with the BDS Adjustable Trackbar. Steering stabilizer selection is also narrowed by the manufacturer — OE-style stabilizers in the OE taper position only; through-shaft designs are not recommended.
This Product Is For You If
- You own a 2005–2016 Ford F-250 or F-350 Super Duty, 4WD, standard-track configuration.
- You want to replace worn or underperforming OE drag-link components.
- You want a drag-link assembly with Apex's ProLock system designed to help secure the connection against loosening.
- You are running an OE-style steering stabilizer in the OE taper-hole position (Fox 985-24-001 or Carli recommended).
- You want a greaseable, pre-greased drag link assembly.
- You prefer black aluminum aesthetics over polished aluminum or DOM steel (other variants available).
This Product Is Not For You If
- Your Ford F-250 or F-350 Super Duty has a wide-track axle configuration.
- You are running a BDS Adjustable Trackbar — contact interference with the Apex drag link is a documented incompatibility.
- You are running a through-shaft steering stabilizer such as the Fox ATS.
- Your vehicle is not a 2005–2016 Ford F-250 or F-350 Super Duty, 4WD.
- You are on a modified-height vehicle and have not confirmed steering geometry, drag-link adjustment, and clearance requirements with a qualified installer.
Product Family Reference
The KIT371 ProLock Drag Link Kit is available in multiple adjusting rod materials for the same Ford F-250/F-350 4WD, standard-track application:
| Variant | Adjusting Rod Material | Finish |
|---|---|---|
| KIT371-BLK (this product) | 2" 7075-T6 Aluminum | Black powder coat |
| Polished aluminum variant | 2" 7075-T6 Aluminum | Polished raw aluminum |
| DOM steel variant | 1.75" DOM SAE 1020 Steel Tube | Black powder coat |
All fitment and compatibility requirements stated on this page apply to this SKU only. Confirm specifications for other variants against their respective product documentation.
Common Questions
What is wide track, and how do I know if my truck has it?
Wide-track axles have a wider-than-standard front track width. Confirm your front axle track designation with your dealer or a qualified shop before ordering.
I have a lifted truck — does this kit fit?
Apex does not publish a specific lift-height range for this kit. Confirm steering geometry, drag-link adjustment, stabilizer position, and clearance during professional installation and alignment on any modified-height application.
What makes the ProLock system different from a standard drag link?
The ProLock system uses a machined keyway on the drag link end threads, a precision-cut keyway washer, and a jam nut with integrated set screws, designed to help secure the drag-link connection and reduce the risk of loosening under load.
My pitman arm end is inverted from lifting — can I still mount a steering stabilizer?
Yes. The included stainless steel taper sleeve is reversible, allowing stabilizer mounting from either side of the drag link end.
Which steering stabilizer is compatible?
Apex recommends OE-style stabilizers — Fox Part 985-24-001 or Carli. Mount in the OE taper-hole position on the pitman-arm-side drag link end. Through-shaft stabilizers such as the Fox ATS are not recommended.
What are the replacement set screws if mine wear out?
Replacement set screws for the drag link are Apex part number XP172, sold separately.
What is the warranty?
Apex covers manufacturer defects, premature wear, and breakage for the life of the vehicle, as long as the original purchaser owns the vehicle, with product registration required within 90 days of purchase. See the full warranty summary below.
Manufacturer Data Disclaimer
Fitment, specification, compatibility, and warranty data for this kit are sourced from Apex Chassis manufacturer product documentation and OFAS-verified product data current as of publication. Specifications are subject to change without notice; confirm current documentation for this SKU at the time of purchase.
Required Legal, Warning, Fitment, and Return Notices
California Residents: Confirm California compliance for off-road and on-road use of aftermarket steering components before purchase.
Warranty Summary: Apex Chassis warrants this product against manufacturer defects, premature wear, and breakage for the life of the vehicle, provided the original purchaser continues to own the vehicle. The product must be purchased through Apex Chassis directly or through an authorized Apex dealer, and must be registered with proof of purchase within 90 days of purchase. Products not registered within 90 days are covered only for 90 days from the date of purchase. Apex will, at its sole discretion, replace the defective part and cover ground shipping, or refund the original purchase price. Labor for removal or reinstallation is not covered. This warranty does not cover cosmetic imperfections, boots, bushings, or Heim-style joints, which are considered regular wear items. The warranty is void if the component is improperly installed, modified, or used in an application for which it was not designed, as determined at Apex's sole discretion. This warranty is governed by the laws of the State of Arizona.