Apex Chassis ProLock Steering Kit — Ford F-250/F-350 Super Duty SKU: KIT370 | Ford F-250/F-350 2005–2016 4WD

This kit replaces both the factory tie rod and drag link on the 2005–2016 Ford F-250/F-350 Super Duty with a matched Apex ProLock tie rod and drag link assembly. The kit uses a 2.125-inch 7075-T6 polished aluminum tie rod, a 2-inch 7075-T6 polished aluminum drag link, forged steering ends, mechanical ProLock keyway retention, and serviceable grease fittings.

Before ordering: This kit fits standard-track 2005–2016 Ford F-250/F-350 Super Duty 4WD applications only. It is not compatible with wide-track axle configurations or the BDS Adjustable Trackbar. On 2005–2007 trucks, this kit will not work with a stock steering stabilizer — a lower steering stabilizer mount or dual stabilizer kit (Apex KIT178) is required. Verify steering stabilizer type and mounting location, stabilizer clamp diameter and material, and all clearance requirements before ordering.

Required separately: Apex KIT524 aluminum wrench kit; blue medium-strength thread locker; anti-seize for adjusting-sleeve internal threads only; high-pressure lithium grease; and a professional alignment. Steering stabilizer not included. For 2005–2007 trucks: lower steering stabilizer mount or Apex dual stabilizer kit KIT178 (required, sold separately).

Verified Fitment

2005–2007 application note: This kit is compatible with 2008+ trucks without additional components. On 2005–2007 trucks, this kit will not work with a stock steering stabilizer — a lower steering stabilizer mount or Apex dual stabilizer kit KIT178 is required.

Component Specifications

What Is and Is NOT Included

Included:

• Complete ProLock Tie Rod assembly — 2.125" 7075-T6 polished aluminum rod
• Complete ProLock Drag Link assembly — 2" 7075-T6 polished aluminum rod (ends DL318 and DL317)
• ProLock keyway washers for both tie rod and drag link ends
• Jam nuts with integrated set screws (both assemblies)
• Reversible stainless steel taper sleeve (drag link)
• Grade 8 / Class 10.9 hardware, castle nuts
• Zerk fittings (pre-threaded, pre-greased)

Not included:

• Tie rod replacement set screws (XP171, sold separately)
• Drag link replacement set screws (XP172, sold separately)
• Aluminum wrench kit KIT524 — WR113 46mm/50mm and WR114 46mm/55mm (required, sold separately)
• Thread locker (blue Loctite 243 or blue Permatex 24206 recommended)
• Anti-seize compound (for adjusting sleeve threads only)
• Steering stabilizer (sold separately)
• For 2005–2007 trucks: lower steering stabilizer mount or Apex dual stabilizer kit KIT178 (required, sold separately)

Critical Compatibility

• Wide track: Not compatible. Confirm standard-track axle before ordering.
• BDS Adjustable Trackbar: Not compatible with this drag link. The BDS adjuster sleeve will contact the Apex drag link during operation.
• 2005–2007 trucks: This kit will not work with the stock steering stabilizer on 2005–2007 F-250/F-350. A lower steering stabilizer mount or Apex dual stabilizer kit KIT178 is required for these model years.
• Steering stabilizer mounting: Steering stabilizers must use the OE taper-hole mounting location on the pitman-arm-side drag link end. Apex recommends OE-style stabilizers, including Fox Part 985-24-001 and Carli. Through-shaft stabilizers, including the Fox ATS, are not recommended.
• Dual steering stabilizers: Due to tie rod ends being 1/8" larger in diameter than OE, dual stabilizer kit tie rod end brackets may require modification.
• Stabilizer clamp — aluminum kit: Requires DC2.125-B, DC162 (Carli), or equivalent aluminum-assembly clamp. Do not use steel-assembly clamps (DC2.0-Z or DC2.0-B) on this variant.
• Reversible drag link: On lifted or modified applications where the pitman-arm end is inverted, the included stainless steel taper sleeve supports stabilizer mounting from either side. Final steering geometry, thread engagement, and clearance must still be verified during installation and alignment.
• Minimum engagement — drag link: If the minimum engagement mark on the drag link end threads is visible, thread engagement is insufficient. Adjust the sleeve position or address lift height as required.
• Replacement set screws: Tie rod and drag link set screws are different part numbers — XP171 and XP172 respectively. Order the correct part for the assembly being serviced.
• Lifted and modified-height trucks: Confirm drag-link adjustment, thread engagement, pitman-arm and track-bar relationship, stabilizer location, wheel and tire clearance, and lock-to-lock steering travel during installation and alignment.

Installation Notes

Steering components are safety-critical. Professional installation is strongly recommended, and a professional alignment must be completed before operating the vehicle. The installer must follow the current Apex Chassis installation instructions supplied with the product throughout installation and alignment.

Required for the KIT370 assembly: Apex wrench kit KIT524 (WR113 46mm/50mm and WR114 46mm/55mm); medium-strength blue thread locker (Loctite 243 or Permatex 24206); anti-seize compound for the internal adjusting-sleeve threads only; and high-pressure lithium grease.

For 2005–2007 trucks: A lower steering stabilizer mount or Apex dual stabilizer kit KIT178 is required before installation. Do not attempt to use the stock stabilizer with this kit on 2005–2007 trucks.

Before operating the vehicle, verify correct application, steering geometry, adequate thread engagement, steering-stabilizer placement, clamp compatibility, and full lock-to-lock clearance. After alignment, complete all manufacturer-specified ProLock washer, set-screw, torque, grease, and inspection procedures per the current Apex instructions.

Inspect jam-nut position after the initial 500 miles and then every 5,000 miles or at each oil change, consistent with Apex's maintenance guidance. Refer to the current Apex Chassis installation instructions supplied with this kit for complete procedures, torque specifications, and all safety requirements.

The Obsidian Take

The KIT370 is Apex's complete ProLock tie rod and drag link replacement for the 2005–2016 Ford F-250/F-350 Super Duty, standard-track, 4WD. Both assemblies use ProLock keyway washers. Installation of this polished aluminum kit requires the Apex KIT524 wrench kit. Complete a professional alignment before operating the truck. Confirm three primary compatibility conditions before ordering: wide-track axles are not compatible; the BDS Adjustable Trackbar is not compatible with the drag link; and the steering stabilizer must use the OE taper-hole mounting location on the pitman-arm-side drag-link end. Apex recommends OE-style stabilizers and does not recommend through-shaft designs such as the Fox ATS. On 2005–2007 trucks, the stock stabilizer is incompatible and must be addressed before installation. On lifted or modified applications where the pitman-arm end is inverted, the reversible drag link and included stainless-steel taper sleeve support stabilizer mounting from either side; final steering geometry, thread engagement, and clearance must still be verified during installation and alignment. Each component carries its own replacement set screw part number — XP171 for the tie rod, XP172 for the drag link.

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 both the tie rod and drag link as a complete matched set.
• You prefer polished aluminum aesthetics over anodized black or DOM steel.
• You are running an OE-style steering stabilizer in the OE taper-hole position (Fox 985-24-001 or Carli recommended).
• On 2005–2007 trucks: you are prepared to add a lower steering stabilizer mount or Apex dual stabilizer kit KIT178.
• You are prepared for a professional-level installation requiring KIT524, specific Apex torque and ProLock procedures, and a professional alignment.

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.
• You are committed to using a through-shaft steering stabilizer, such as the Fox ATS; Apex does not recommend that configuration with this kit.
• Your vehicle is not a 2005–2016 Ford F-250 or F-350 Super Duty, 4WD.
• You own a 2005–2007 truck and are not prepared to address the stock steering stabilizer incompatibility with a lower mount or Apex KIT178.
• You are on a modified-height vehicle and have not confirmed steering geometry and clearance requirements with a qualified installer.
• You do not have or are not prepared to obtain Apex aluminum wrench kit KIT524 before installation.
• You prefer anodized black or DOM steel — see the KIT370 black-aluminum and DOM steel variants.

Product Family Reference

Need only one component? Shop the applicable Apex ProLock tie rod or drag-link replacement for your 2005–2016 Ford F-250/F-350 Super Duty. Verify the exact SKU, material, finish, and application before ordering.

For the 2017–2026 Ford F-250/F-350 Super Duty, see the KIT375 family.

Common Questions

Is this compatible with wide-track axles?
No. This kit is not compatible with wide-track axle configurations.

Is this compatible with the BDS Adjustable Trackbar?
No. The drag link in this kit is not compatible with the BDS Adjustable Trackbar.

I have a 2005–2007 truck — what do I need to know?
This kit will not work with the stock steering stabilizer on 2005–2007 F-250/F-350. A lower steering stabilizer mount or Apex dual stabilizer kit KIT178 is required.

Which steering stabilizer is compatible?
OE-style stabilizers mounted in the OE taper-hole position on the pitman-arm-side drag link end — Fox Part 985-24-001 and Carli are recommended. Through-shaft stabilizers such as the Fox ATS are not recommended.

What stabilizer clamp do I need?
This aluminum kit requires a DC2.125-B, DC162 (Carli), or equivalent clamp designed for the aluminum assembly diameter. Do not use steel-assembly clamps (DC2.0-Z or DC2.0-B).

What tools and consumables are required?
Apex wrench kit KIT524 (sold separately), blue medium-strength thread locker, anti-seize compound for adjusting sleeve internal threads only, and high-pressure lithium grease. Refer to the current Apex installation instructions for complete requirements.

Is a professional alignment required?
A professional alignment must be completed before operating the vehicle. All ProLock washer and set-screw procedures are completed after alignment.

What does the Apex warranty cover?
Apex's Honor System Warranty provides coverage for qualifying manufacturer defects, premature wear, and breakage, subject to its registration, ownership, installation, application, and exclusion terms. See the full warranty summary below.

Manufacturer Data Disclaimer

Fitment, specification, compatibility, installation, and warranty data for this kit are sourced from Apex Chassis manufacturer product documentation and installation instructions, 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

Safety Warning: Steering is a critical safety component. The installer must read and follow the provided installation instructions in full. Failure to follow these instructions may result in loss of vehicle control, accident, and injury. Failure to follow installation instructions and use correct installation tools may also void the warranty.

Warranty Summary: Apex's Honor System Warranty provides coverage for qualifying manufacturer defects, premature wear, and breakage, subject to its registration, ownership, installation, application, and exclusion terms. The product must be purchased directly from Apex Chassis or through an authorized Apex dealer and registered with proof of purchase within 90 days of purchase. Products not registered within 90 days are covered for 90 days from the date of purchase. At its sole discretion, Apex may replace the defective part and cover ground shipping or refund the original purchase price. Labor for removal or reinstallation is not covered. Cosmetic imperfections, boots, bushings, and Heim-style joints are regular wear items and are not covered. Coverage is void for improper installation, modification, or use outside the intended application, as determined by Apex. Review Apex's current full warranty terms before purchase.