Porsche 911 GT3 Cup and Porsche 911 GT3 RSR race cars – more than three dozen of them – will be competing in the upcoming 61st running of the Mobil 1 Twelve Hours of Sebring on March 16 at Sebring International Raceway, and at least half of the teams brought cars and drivers to the track this week to the American Le Mans Series/IMSA GT3 Cup …
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