The Guernsey driver topped the time-sheets by an impressive margin on the opening day of the opening two-day test for the new Porsche Carrera Cup North America series at Sebring International Raceway, which saw 28 cars taking part.
The test marked the international debut of the new Porsche 911 GT3 Cup car using the type 992 chassis, with a total of 420 laps across 19 cars.
Priaulx, who is driving for Kelly-Moss Racing, set the fastest time of 2min. 00.870sec. around the 17-turn Florida circuit, with his nearest rival being his teammate Kay van Berlo, who was half-a-second behind.
Riley Dickinson set the third fastest time in the No. 3 Team Hardpoint-EBM car.
Twenty-three 2021 Porsche 911 GT3 Cup cars are entered for the season ahead, with 10 Pro entries and an additional nine Pro-Am class entrants.
‘We could not be more pleased with how the first day of the Porsche Carrera Cup North America went,’ said Porsche Motorsport North America President and CEO Dr Daniel Armbruster.
‘It is testimony to the PMNA team.
‘Additionally, the customer debut of the new Porsche 911 GT3 Cup race car was equally successful.
‘The cars were immediately fast and the teams and drivers showed how professional they are by finding speed right from the start.
‘We still have one full day of testing and I expect each team will leave fully ready to make the car’s competition premiere here next week.
‘We have every expectation that Porsche Carrera Cup North America will prove equal to any Carrera Cup around the world.’
The Porsche Carrera Cup North America series starts at Sebring next week.