JK ALUMINUM Mid Arm Kit

The JK Aluminum Mid Arm Kit replaces every steel control-arm link on your Jeep Wrangler JK with machined 7075-T6 aerospace-grade aluminum, dropping unsprung weight front and rear without giving up the strength needed for hard crawling. All eight link ends ride on rebuildable Rock Krawler Krawler Joints with jam nuts, so ride height, caster, and pinion angle stay adjustable on the vehicle.

Key Features

• Full front and rear mid-arm link set machined from 7075-T6 aerospace-grade aluminum
• 2.0" OD polished aluminum lower links for a strong, light foundation under the axles
• Rock Krawler Krawler Joints with wrench flats and matching jam nuts at every end for easy adjustment
• Threaded ends let you set link length to fine-tune alignment and axle position
• Rust-resistant aluminum eliminates the repainting that bare steel links need
• Direct swap for factory-style steel Rock Krawler mid-arm links, verified compatible with Artec's 1-ton swap kit

Fitment & Compatibility

Fits the Jeep Wrangler JK and JKU (2007-2018), front and rear. It is confirmed to work with Artec's 1-ton axle swap kit when running the Daystar or Johnny Joint factory 4-link options. Completing the mid-arm conversion typically calls for the JK HD Crossmember with Link Mounts and an Adjustable Truss Upper Link Mount, sold separately. Prefer to keep the front as a three-link? See the JK Aluminum Mid Arm Kit (Front 3-link).

Specifications

What's in the Box

• 4 × 2.0" OD 7075-T6 polished aluminum lower links
• 4 RH and 4 LH 1.25"-12 tpi x 9/16" Rock Krawler joints with 4 RH and 4 LH 1.25"-12 tpi jam nuts
• 4 RH and 2 LH 7/8"-14 tpi x 9/16" Rock Krawler joints with 4 RH and 4 LH 7/8"-14 tpi jam nuts
• 2 LH Rock Krawler 7/8" UCA U-brackets with stud

Frequently Asked Questions

Does this work with the Artec 1-ton swap kit?
Yes. It is confirmed compatible with the 1-ton swap kit when using the Daystar or Johnny Joint factory 4-link options.

What is the difference between this and the Front 3-link version?
This kit keeps the standard mid-arm 4-link geometry front and rear. The Front 3-link version sets the front up as a three-link.

Which JK years and body styles fit?
The 2007-2018 Jeep Wrangler JK and 4-door JKU, both front and rear.

Do I have to weld anything?
The links themselves bolt in as a direct replacement. A full conversion may add bracketry like the HD Crossmember, which can require welding depending on your build.

Are the aluminum links durable enough for the trail?
Yes. The 7075-T6 links are tested for years of extreme crawling and daily driving and save considerable weight over steel.