Porsche tuning house and RUF-rival 9ff is building an all-new 900hp supercar based on the 911's powertrain. The mid-engined 9F-GTI, as it's known in production, will be powered by a four-liter version of Porsche's 3.6-liter flat-six, and will utilize a tubular spaceframe created by 9ff engineers. No word on what such an animal would look like, though a riff on the Carrera GT wouldn't be unlikely — possibly like the AutoBild spec job, pictured.
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Tuner Porsche Breaks Speed Record [internal]