Once again, a 992-generation Porsche 911 test mule has been spotted out in the wild, and this time our spy photographers indicate that it could be the next-generation GT3 hiding beneath what we can determine thus far to be the Turbo body, equipped with the side scoops ahead of the rear wheels.

Compared between prototypes, the GT3 mule here differs from the 992 Turbo mule seen earlier, where the latter was spotted wearing quad trapezoidal tailpipes as opposed to the one-a-side items here that are much larger in diameter. Further visual cues include the centre-locking wheels, which are standard on the GT3 but optional on the Turbo; the 992 Turbo prototype was seen testing with five-lug wheels.

The test mule here would likely be powered by turbocharged engine, according to our spy photographers, and the bodywork appears to be in line with that observation as the separate, twin exhaust outlets on this car are akin to those on the GT2 RS rather than the centrally-mounted exhausts on the GT3 and GT3 RS.

A later test mule should include the GT3 hallmarks of a more prominent front bumper and larger rear wing for model-specific aerodynamics. A GT-class 911 should retain rear-wheel drive, and the now-commonplace rear-wheel steering should feature too.

The move to turbocharging across the board has been confirmed by an earlier Autocar report, and the adoption of forced induction will bring the next-generation GT3’s output to beyond the 500 hp it produces in its current, naturally aspirated 4.0 litre flat-six guise.

GALLERY: 992-generation Porsche 911 Turbo spyshots