This is what they did to slow a few down. Ford GT: 10 kilogram increase in weight over qualifying spec, reduction in turbo boost pressureFerrari 488 GTE: 15 kilogram increase in weight over qualifying spec, 2-liter increase in fuel capacityCorvette C7.R: 0.2 mm increase in air restrictor size, 2-liter increase in fuel capacityAston Martin Vantage GTE: 0.2 mm increase in air restrictor size