Courtesy of a 769-horsepower twin-turbocharged 4.0-liter V8, the Ferrari SF90 is a fairly rapid supercar. With the help of a trio of electric motors, Maranello's wheeled sculpture can blast to 60 mph in a mere 2.1 seconds before running out of steam at 211 mph. With this in mind, it comes as no surprise that the SF90 holds the lap record at the famed Indianapolis Motor Speedway.

But it's hard to satisfy Maranello's power-crazed engineers. Not pleased with the neck-snapping performance, Ferrari is working on a more hardcore variant of the SF90.

In the following video, we can see a pair of disguised test vehicles hitting the Italian streets. The duo appears to be unchanged from the regular model, but keen-eyed readers will spot the unique front bumper, while a sheet hides what is likely to be a redesigned hood with a new air duct.

For now, the rear appears unchanged from the normal SF90. However, rumors suggest the racier variants will feature a dual-exhaust setup along with a rear-mounted wing. The test mules reportedly go by the F173VS codename; VS stands for Versione Speciale (Special Version). At this stage, details remain scant but, judging by previous Ferrari Speciale derivatives, the newcomer will be more powerful and benefit from a crash diet.

No Spider models have been seen prowling the streets of Maranello, but we assume the Prancing Horse will offer the SF90 Versione Speciale in both body styles. The Italian supercar maker has been cooking up an assortment of new vehicles, including the Purosangue SUV that should arrive in 2023. While many manufacturers are moving away from the V12 configuration, Ferrari has proudly shoehorned a 12-pot under the hood of its first-ever SUV.

These aren't the only test units doing the rounds, though. Recently, Lamborghini was spotted benchmarking the SF90, with the Sant'Agata Bolognese-based automaker likely hoping to learn from Ferrari's impressive hybrid/powertrain packaging. With the Huracan now getting on in years, the Raging Bull is most likely developing a worthy successor with a similar hybrid setup.

With regards to Ferrari, the Purosangue and SF90 Versione Speciale isn't the only thing the Italian supercar maker is hard at work on. We've previously seen a V12-engined Roma doing the rounds and, while the idea of a 12-cylinder Ferrari GT would be wonderful, a more likely explanation is that the brand's elegant grand tourer is being used as a test mule for the upcoming 812 Superfast's successor.