The Corvette C8.R GTD & BMW M4 GT3 are among the GTD spec cars hit with Balance of Performance adjustments ahead of next weekend’s Acura Grand Prix of Long Beach.
Confirmed in the latest technical bulletin from IMSA, the Mobil 1 Twelve Hours of Sebring GTD Pro class-winning
Corvette has been given 10 kg of additional weight, and a 0.4 mm smaller air restrictor equating to an 8.3 horsepower decrease as well as a 4 liter reduction in fuel capacity.

The Corvette is now running with a total of 50 kg of ballast compared to its previous specification in the GT Le Mans class.

The new-for-2022 BMW, meanwhile, will have a 17-horsepower reduction but slightly offset with a 20-kg reduced minimum weight and 8-liter fuel capacity reduction to coincide with the power cut.

Notice WeatherTech never negative BoPs their own car in this class ?