The Eibach 35mm Rear Anti-Roll Kit is a rear sway bar built for the supercharged 6.2L WK2 Jeep Grand Cherokee Trackhawk. The manufacturer's listing describes performance-tuned sway bars with urethane bushings, precision forged ends, and black anodized billet aluminum brackets. Owners on user forums say the upgrade brings a noticeable improvement in handling with no additional NVH. Because the Trackhawk's stock rear bar is 1.1" in diameter, the larger 35mm bar adds real roll stiffness for drivers who corner hard or use the Trackhawk on mountain roads. The bar is tubular and non-adjustable, so the stiffness is fixed rather than tuned through hole settings.
This kit is a good fit for an owner running Eibach lowering springs or dampers, since the manufacturer positions the sway bar as a complement to its spring and damper lines. It is a bar-only package, so plan on reusing or sourcing matching rear end links. Owners on user forums report that the stock end-link studs do not carry over cleanly and that aftermarket end links were needed to match the Eibach bar. Searches such as Trackhawk rear sway bar upgrade, WK2 35mm anti-roll bar, and Trackhawk body roll reduction point to this part's exact application.
The manufacturer lists this as a rear sway bar kit only. Owners on user forums report needing matching aftermarket end links to get the Eibach bar installed.
The manufacturer's listing covers the 2018–2021 Jeep Grand Cherokee Trackhawk. The product title references 18–19, so confirm your model year with the manufacturer before ordering.
Owners on user forums report that the exhaust must be lowered to access the rear sway bar mounts and end links. Removing the rear diffuser panel helped them reach the bolts.
This is a moderate DIY job that takes most home mechanics longer than the 30 minutes the instructions suggest. Owners on user forums report that the rear bar mounting bracket bolts and end-link nuts are 18mm, and they recommend setting the torque with the vehicle at ride height, supported on jack stands under the control arms. Expect to lower the exhaust hangers and remove the rear diffuser panel for access. Use a torque wrench, and consider thread-locking compound on the fasteners, as owners have done. Confirm final torque values with the manufacturer, since the instruction sheet for this part was not located during research.
