You might not think there's much room for improvement in the Porsche 911 GT3, but tuner Manthey Racing disagrees.
When equipped with the new Manthey Kit and unleashed on the Nürburgring, the 992.2 GT3 set a lap time of 6:52.981 minutes, which Porsche points out is 2.76 seconds faster than the 992.1 GT3 with ...
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