The pair of Corvette C7.Rs will head into next weekend’s Michelin GT Challenge at Virginia International Raceway with additional power, in the latest round of Balance of Performance adjustments.

IMSA confirmed on Wednesday that the GT Le Mans championship-leading Corvettes will have a 0.5mm larger air restrictor, along with an increased refueling restrictor.

Both the BMW M6 GTLM and Ford GT, meanwhile, have been handed decreases in refueling restrictor, with the Ford also getting a three-liter reduction in fuel capacity.

Fuel adjustments have also been made to the Acura NSX GT3 in GT Daytona, with a 3-liter reduction in capacity and reduced refueling restrictor also as a result.

The Audi R8 LMS will also have a reduced refueling restrictor, while the Ferrari 488 GT3 has been given a larger one.

The Michelin GT Challenge is set for Aug. 25-27.