9ff

The 9ff brand is a German performance engineering company recognized for building some of the fastest road-legal Porsche-based sports cars in the world. Founded by Jan Fatthauer, 9ff specializes in extensive engine upgrades, aerodynamic enhancements, suspension tuning, and lightweight components designed to push Porsche performance far beyond factory specifications. Its projects range from refined street-focused conversions to record-setting high-speed machines, earning the company a respected place among European tuning specialists. For enthusiasts seeking extreme performance while retaining the character of a Porsche platform, 9ff represents a distinctive name in the world of high-performance automotive engineering.