900HP 9ff Porsche 997 Turbo S Convertible – Amazing Sounds!

Here is another incredible fast 900HP Porsche 997 Turbo S convertible tuned by 9ff Engeneering. Video shows you a couple of dragracing against a WKT 685hp Opel Kadett and another tuned Porsche 997 Turbo. The sound of this Porsche is amazing!

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