The Dortmund-based Porsche tuning outfit, 9ff, has attained the same 'car maker' rating as rival Ruf. Even before its change of status, 9ff had begun work on its own supercar project, which although very loosely 911-based and inspired by the GT1, comprises mostly in-house-designed components. The 9F-GT1 has a tubular spaceframe and mid-mounted 900bhp 4-litre flat-six.