Spy Photos Tease Return of Shelby GT500 Mustang

Spy photographers caught a camouflaged Mustang prototype hiding a supercharged V8 back in 2017, and the internet spent years guessing what it meant. The answer turned out to be one of the most powerful factory Mustangs ever built. Here’s how those grainy spy shots turned into the 760-horsepower Shelby GT500, and why a new generation of prototypes is already back on the road.


For nearly 40 years enthusiasts have coveted ’60s Muscle Cars for their compelling designs, fun names and high-horsepower engines. Who wouldn’t want an LS6 Chevelle, 440 Road Runner or Boss 429 Mustang in the garage? But if you want the ultimate in showroom performance, your hot rod better be new and be called ZL1, Hellcat, Demon or Shelby.

A camouflaged prototype car undergoing testing on the road.

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Camouflage wrap and questions were about all Ford ever gave away back when this shadowy prototype first got caught testing on public roads. Spy photographers chase disguised mules for a living, and most sightings amount to little more than a blurry hood bulge and a rumor. This one was different. Underneath the black-and-white vinyl wrap was a supercharged Voodoo-based V8 destined for a nameplate that had been dormant for years, and the engineers testing it clearly weren’t chasing a mild refresh. What eventually rolled out of Dearborn would turn out to be one of the most powerful factory Mustangs ever built — but in 2017, all anyone really had to go on was a grainy photo and a hunch.

From Mule to Production Car

A source close to Motor Trend photographed a supercharged version of the 5.2-liter Voodoo V8 under the hood of a disguised Mustang, and the internet spent the next three years speculating about what it meant. The answer arrived in 2020: a production Shelby GT500 packing a supercharged 5.2-liter V8 rated at 760 horsepower and 625 lb-ft of torque, making it the most powerful street-legal Ford ever sold at the time. Unlike the road-course-focused GT350, the revived GT500 leaned hard into drag-strip theatrics, running quarter-mile times in the low 10-second range straight from the factory — numbers that would have embarrassed purpose-built race cars a generation earlier.

No Convertible, No Compromise

Ford kept the 2020-2022 GT500 fastback-only, skipping both a convertible and even a sunroof in the name of weight savings and structural rigidity — a deliberate departure from the model’s droptop-friendly Shelby ancestors of the 1960s. That single-minded focus paid off on the stopwatch: reviewers routinely clocked 0-60 mph runs in the low 3-second range, remarkable for a car riding on a chassis architecture with roots stretching back decades. The lack of a convertible became one of the more debated omissions among enthusiasts who remembered earlier Shelby droptops, and it set up an obvious opportunity for whatever Ford built next.

The Next Mule Is Already Out There

Fittingly, the cycle has already repeated itself. Spy photographers have caught a new generation of camouflaged GT500 prototypes testing again, and reports suggest this next version may finally bring back a convertible variant — a twist earlier GT500 fans will appreciate. It’s a reminder that today’s blurry spy shot is tomorrow’s dealer lot fixture, and that Ford’s performance team rarely lets a dormant nameplate stay quiet for long.

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