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Supercars still too slow at 300kph?
Many a motoring fan will swoon at the looks of a Porsche 911 Turbo, Bentley Continental GT or Ferrari F430 which come with performance figures closely matching those of a Formula One racing car. For some owners of such cars, however, a top speed of 300kph is still not enough with some tuning firms specialising in suping-up such supercars.