Despite wearing a coat of incognito black, this test mule's NACA ducts, swan neck wing, and a raspier exhaust note leave an indelible impression on the keen observer's mind. The unmistakable shape and even proportions of a 718 Cayman, dressed in all the aerodynamic accessories, suggest that Porsche is looking at wedging a harder, faster version of their midship into their stable. Thanks to the keen eyes at Auto Addiction, we now have a glimpse at what might be that which so many of us have yearned for—a Cayman GT4 RS.

Like this prototype's distinctive aerodynamic features, its engine note suggests a greater level of focus. Compared to the sweet, sonorous tone of the latest Cayman GTS' 992-based 9A2EVO motor, this has the urgency, the volume, and the additional revs fitting for a racing engine. Listening to the way the exhaust note distorts slightly at the top of the rev range is reminiscent of a GT3 RS' characteristic throatiness as it soars above 6,000 rpm.

Talk of 500 horsepower is making the rounds, and if that is the case, it would fit the middleweight Cayman just beneath the latest GT3 and maintain the accepted pecking order. More than enough power for a lightened 718 frame, albeit one with strengthened suspension components and a PDK gearbox. If it's intended for fast laps alone, it's likely Porsche won't be appeasing the enthusiasts with an h-pattern gearbox anytime soon.

Interestingly, the calipers aren't painted in the telltale yellow of the ceramic items we're accustomed to seeing on the GT-series 911s, but the steel discs are cheaper and easier to maintain, which makes them ideal for the serious track driver. Like so many facets of this intriguing new machine, the brakes suggest a level of purposefulness that can elude some of the flagships which spend their lives on the boulevards—the kind which caters to the diehard track driver.

We can't wait to see it after this Cayman's been shaken down, and preferably in a brighter shade which showcases those aero pieces a bit better. With a coat of Miami Blue, this track toy might be as beautiful as it is quick.