The Fox 2.0 Performance Series TS Steering Stabilizer (part 985-02-122) is a through-shaft damper from Fox's Performance Series line, built on the same platform as Fox's ATS stabilizer for the Jeep Wrangler JK. Its through-shaft design is meant to keep damping consistent across the full stroke in both directions, so it does not produce the push-and-pull feel of a conventional single stabilizer. This model is made for the 1-5/8" aftermarket tie rod. If your JK still has the factory 1-3/8" tie rod, the manufacturer lists a different part (985-02-121) for that setup. Buyers choosing between this and a cheaper stabilizer should look at the damping design and the fit to their tie rod, since a mismatched clamp or stabilizer can make the install a problem.
The stabilizer is worth the price for lifted JKs and builds running oversized, aggressive tires, where steering feedback and bump steer become a daily annoyance. The 2.0 body and the application-specific valving are tuned for these heavier loads and are backed by a limited one-year warranty from Fox. Searches like "Jeep JK 1-5/8 tie rod steering stabilizer," "985-02-122 through shaft install," and "JK 2.0 TS stabilizer lift kit" match what this part is built to solve. For a DIY owner, it is a bolt-on job that swaps the stock stabilizer and tie rod bracket for Fox's relocating hardware. Expect to align the vehicle afterward.
The manufacturer lists 985-02-122 with a 1-5/8" tie rod clamp for 2007-2018 Jeep Wrangler JK applications. The factory 1-3/8" tie rod uses the 985-02-121 version instead.
The manufacturer's install guide says that if removing the stabilizer requires a wheel alignment, the tie rod clamp must be re-mounted in its marked position afterward.
Per the manufacturer's JK install guide, start by removing the stock steering stabilizer and the tie rod bracket. Loosely mount the tie rod clamp and the track bar clamp, attach the eyelet end of the stabilizer to the track bar, and then tighten everything once the orientation is set. Because the clamp sits on the tie rod, plan on an alignment after the install, and mark the clamp position before you remove it so you can return it to the same spot. Fox's guide is the source for torque and step-by-step details, so confirm those specs there before you start.