PREVIEW: Porsche 911 GT3 – 493bhp 4.0-litre and a manual 'box

Watch our newest films before they're on YouTube: The 991.2 Porsche 911 GT3 is here! There's a new 493bhp 4.0-litre flat-six engine, the option of the six-speed manual gearbox from the limited-edition 911 R, and lots more besides. Settle down as Andreas Preuninger, Porsche GT Project Director, guides DRIVETRIBE's Features Editor Henry Catchpole around the latest Porsche 9

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