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2026 Ford Mustang Shelby GT500 Prototype Packs Roll Bar: Photos

Just yesterday, Ford Authority spotted what may very well be the first 2026 Ford Mustang Shelby GT500 integrated prototypes out testing, though it’s unclear if that particular model will be making a comeback, or if it will be called something else entirely. What we do know is that this prototype sighting signals the impending arrival of a potentially higher-performance Mustang variant than the current range-topping Dark Horse, as it’s equipped with a host of interesting – and in some cases, hardcore – features, one of which is a roll bar inside the cabin.

A photo showing the exterior of a 2025 Ford Mustang Shelby GT500 prototype from a front three quarters angle.

As we can see in these photos, there is clearly a roll bar present in the cabin of this 2026 Ford Mustang Shelby GT500 prototype behind the front seats, which is something typically reserved only for some serious track-focused performance vehicles, such as the Porsche 911 GT3/GT3 RS. Currently, there are plenty of third-party companies that sell roll bars for the Mustang, so it’s possible that Ford is considering adding one to a future production model.

Other than this interesting feature, there are several other notable differences present on this prototype when compared to a regular Mustang Dark Horse. Those include a revised front fascia covering larger radiators, as well as the same exact wheels present on the S550-generation GT500. In this case, those are the units that were part of the optional Carbon Fiber Track Pack, though we spotted another prototype wearing the “base” wheels coupled with that same model. The prototypes are also sporting a mule sticker on the front fenders, just behind the Dark Horse badging, which is a term we tend to use to refer to vehicles in the earlier stages of development.

At the moment, it’s unclear if these prototypes signal the return of the GT500 for the S650 generation Mustang, or perhaps some sort of hotter Dark Horse variant. The Blue Oval has been mulling the idea of using a different nameplate for its future range-topping pony car, as Ford Authority exclusively reported roughly one year ago. However,  a letter sent from the UAW to its members signaled that a new GT500 is on the way, which was later confirmed by the Detroit Free Press, via a source familiar with the program itself. Regardless, Ford has filed a variety of trademarks in recent weeks that could also preview this future model’s nameplate as well – including Boss, Dark Horse Boss, and Cobra.

Brett's lost track of all the Fords he's owned over the years and how much he's spent modifying them, but his current money pits include an S550 Mustang and 13th gen F-150.

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