Porsche is not the type of company to rest on its laurels. Instead, it is always pushing the boundaries and searching for new and innovative ways to improve the performance of its models. The following 911 prototype recently spied at Monza goes to prove this.

While it’s unclear exactly what Porsche is testing here, it looks to be exceptionally fast and could very well be the quickest 911 ever designed. Will it be street-legal? Probably not.

The 911 GT2 RS is still very new and with the 992-generation 911 just around the corner, it seems unlikely Porsche will build an even faster model. In fact, the GT3-based Speedster is thought to be the final send-off to the current 911.

In all likelihood, the vehicle filmed undergoing tests is based on the road-going GT2 RS. However, we can see that its interior has been stripped out, there are new aerodynamic canards on the front bumper and, of course, there’s an absolutely huge rear wing. The prototype also features central tailpipes like the GT3, but is evidently powered by an engine with two turbochargers. A near-identical prototype was spied last November at the same circuit.

One possible, and plausible, explanation is that the car in question is a prototype for the new GT2 racing class announced by SRO Motorsports Group earlier this year. The class is set to feature road-based supercars delivering between 640 and 700 hp and will be featured in the Blancpain GT Sports Club and British GT Championship. If this isn’t the case, the prototype is probably being used as a test bed for another racer.