FOX 2.0 ATS Steering Stabilizer: A 10,000-Mile Grenadier Review

The short version

I installed Owl Vans' FOX Race Series 2.0 ATS steering stabilizer on my 2024 INEOS Grenadier Trialmaster at roughly 5,000 miles. The truck has about 15,000 miles now, which makes this a one-year, 10,000-mile review rather than an installation-day impression.

The result is simple: I would buy it again. There have been no leaks, no looseness, no interference and no servicing. It did not change highway driving in any meaningful way. It changed city turns and parking enough that my wife went from not enjoying the Grenadier to having fun driving it.

That last part matters more than anything on a spec sheet.

The problem was not mine

The Grenadier's factory steering honestly did not bother me. I understood what the truck was and got used to it. Gatinha—my wife and the Brains Behind the Brim—had a very different experience.

When I recently asked her what the stabilizer improved, her complete first answer was: “Everything.”

More specifically, turning stopped feeling like work. Parallel parking no longer required all her strength. She still describes the turning radius as “meh,” and she still prefers her 4Runner, but she now enjoys driving the Grenadier and has fun taking it off-road. Before this change, she did not.

That makes this an unusual modification for me. I did not install it to solve something I hated. I installed it because another driver of the truck was fighting the steering every time speeds dropped and the corners got tight. Then, once it was fitted, I liked the change too.

Why the Grenadier steers this way

The Grenadier uses a Bosch hydraulically assisted recirculating-ball steering box rather than the rack-and-pinion arrangement found in most modern passenger vehicles. Turning the steering wheel drives a worm-and-ball-nut mechanism inside the box. Hydraulic pressure supplies assistance, while a sector shaft transfers that motion out to the steering linkage and solid front axle.

INEOS lists 3.85 turns between the locks and a 13.5-metre kerb-to-kerb turning circle for the Station Wagon. It describes the system as off-road-focused and says it tuned the steering for accuracy, feedback and damping.

INEOS does not publish one neat sentence explaining why it chose this system, and I am not going to invent one. Bosch positions this architecture as a robust, high-stiffness design for commercial vehicles, and INEOS paired it with Carraro solid beam axles, five-link suspension and Panhard rods. Put together, the reasonable inference is that durability and predictable behavior under off-road loads mattered more than light, quick, car-like steering.

That is a defensible tradeoff for the Grenadier's mission. It is still a tradeoff, and you feel it most while maneuvering in town.

The turning circle did not change

A steering stabilizer cannot alter the steering box ratio, axle geometry or physical stops. The FOX did not change the Grenadier's published turning circle.

What it changed was Gatinha's ability to get there. With the factory setup, turning the wheel all the way to full lock took enough effort that she often did not actually use all the steering available. With the FOX set softer for city driving, she can comfortably reach the stops. The truck therefore feels as if it has a better turning radius because its full turning circle became usable.

The Grenadier's turning circle did not change. Her ability to use the whole turning circle did.

That distinction sounds technical until you are parallel parking. Then it is the entire point.

What the FOX ATS changes

The ATS is an adjustable steering stabilizer, not additional power steering. Its job is to control unwanted movement through damping. FOX's through-shaft design is intended to keep that damping consistent across the stroke, and the external adjuster provides 24 clicks from softer to firmer.

FOX's own instructions describe the adjustment plainly: clockwise adds damping and steering resistance; counterclockwise removes it. The useful setting is the one that suits the driver and the terrain while still allowing the factory steering stops—not the stabilizer—to define full travel.

Use cases: where it earns its place

Owl's product page pitches the kit for everyday confidence, mixed road-and-trail travel, highway stability and reduced fatigue on long trips. Those are useful ways to think about the upgrade, but they are not all results I can claim from our truck.

City turns, parallel parking and a shared truck

This is our strongest case for it. I run the FOX toward the softer end for city use. Gatinha can turn and parallel park without using all her strength, and reaching full lock is no longer such a struggle. The benefit was not just nicer steering for me. It made a truck we share enjoyable for someone who previously did not want to drive it.

One setup for town and the trail

When I go off-road, I make it stiffer so the damper does more to control kick and rapid movement through the steering linkage. I genuinely change the setting for those conditions. I do not have a sacred click count; the value is being able to choose a different amount of damping for city driving and off-road use. That is how I use it, not a measured claim about better trail performance.

Highway miles: keep expectations honest

On the highway, I noticed no meaningful change. I cannot back up a claim of less fatigue on long trips or better high-speed stability from my experience. If your goal is to transform the Grenadier's cruising behavior, this review is not evidence for it. Our clear improvement happened at the other end of the speedometer: city turns and parking.

The install was the worst part

I ordered the stabilizer from Owl Vans in August 2025 for $524.96 and installed it myself. The job should have been straightforward. Getting the clamp hardware apart was not.

The fastener at the track-bar clamp refused to come loose. I stripped it, tried a hammer drill, drilled into it and tried an extractor. I still could not get it out. This was, in the most accurate technical language available, a big-ass pain.

I also ended up spending more on tools trying to extract that fastener than I paid for the stabilizer itself.

The support trail also exposed some product history worth knowing. FOX identified the damper body in the kit as a RAM 2500/3500 application and pointed to its own Grenadier-specific part number. Owl explained that its kit deliberately paired that damper with an adapter because its testing found the nominal Grenadier application fit poorly. Owl ultimately sent me a replacement assembly with the adapter already installed, along with a prepaid label for the original. That replacement went on at the end of August.

Once the replacement assembly arrived, the remainder of the installation went smoothly and took less than an hour.

A big thanks to Nick Cline from Owl for helping get this sorted out and getting me back to the part that mattered: driving the Grenadier.

The initial fit and fastener problem was severe. Owl's recovery was good. Both belong in an honest review.

The kit has also evolved since mine. Owl's current product page says new orders use an upgraded billet bracket; the older clamp arrangement remains visible only in some historical product photos. A buyer today should not assume my exact installation fight is the current experience, but I would still read the latest instructions before putting the truck on stands.

One year and 10,000 miles later

The Grenadier was otherwise stock when I installed the FOX: factory wheels, tires, suspension, alignment and steering components. That matters because there is no lift, tire change or alignment correction muddying the result.

After roughly 10,000 miles, there is not much of a durability story—which is exactly what I want from a steering component. No leaks. No loose hardware. No interference. No servicing. No new noise or behavior that has made me second-guess the installation.

I have not found a downside in daily use. The price is real, and my installation experience was miserable, but the stabilizer itself has not added an objectionable amount of effort, hidden useful feedback or demanded attention. It has simply stayed in place and done the job.

Owl recommends a rebuild around 50,000 road miles. I am nowhere near that interval yet, so this cannot be a lifetime verdict. It is enough time and mileage to say the upgrade was not a honeymoon effect.

INEOS changed the factory steering too

For model year 2026, INEOS introduced a variable-ratio steering box. The company says the new box has a lower ratio around center for a tighter, firmer on-road feel while retaining the existing ratio farther from center for off-road control. Extended steering-box stops also reduce the turning circle by about five percent.

That is not the factory adopting a FOX-style stabilizer. The two changes solve different parts of the experience: INEOS changed steering ratio and available travel, while the FOX changes damping and resistance. Still, the factory update reinforces the basic observation behind this review. Low-speed maneuverability and on-road steering feel were meaningful opportunities for improvement on the early trucks.

Owners of a 2026 or newer Grenadier should drive the factory setup before assuming they need the same modification. Owners of earlier trucks already know which steering experience they have.

The verdict

Yes, I would buy it again.

For an early Grenadier that spends time in town, especially one shared with a driver who finds the factory steering physically demanding, this is an easy recommendation. In our case it did more than refine steering feel. It made the truck enjoyable for Gatinha. That is the difference between an accessory and an essential upgrade.

Should everyone buy this exact kit without comparison? No. More Grenadier steering-stabilizer options exist now than when I ordered mine, and I have not tested them, so this is not a roundup disguised as a verdict. Owners of later variable-ratio trucks may also be satisfied with the revised factory steering.

But would I put an adjustable stabilizer on our 2024 Trialmaster again? Absolutely. I did not think the factory steering needed fixing for me. Ten thousand miles later, I would not want to take this one off.