The big week for Lamborghini Squadra Corse’s GT3 program has arrived, with Pfaff Motorsport set to give the Temerario GT3 its global race debut as part of IMSA’s GTD Pro field on Saturday at Sebring.

Several of the GT Daytona teams running the new 992-generation Porsche 911 GT3 R are withdrawing from or altering their participation in the IMSA WeatherTech SportsCar Championship following the test at Sebring International Raceway two weeks ago where all Porsche teams were still considerably off the pace.RACER understands that Mark...