The upper rear wing on this test mule is similar to those found on previous GT2’s and may be exchanged for a newer design. However, the lower wing-base with integrated engine air-intake vents looks production-ready. Expect the GT2’s horsepower to be at least 520 when it’s announced later this year with the possibility of as much as 550 or more on the table. Top speed should exceed 200 mph (320 km/h), a first for production-line 911s.