The Cadillac DPi.V-Rs have been slowed even further, in the latest round of Balance of Performance adjustments ahead of next weekend’s Mobil 1 Twelve Hours of Sebring.

The Action Express Racing and Wayne Taylor Racing Cadillacs will face a 20kg increase in minimum weight and a further 0.6mm reduction in air restrictor, following a dominant run in last month’s IMSA-sanctioned test at Sebring.

No other changes have been made to the Prototype class since IMSA’s post-Daytona BoP that was issued prior to the Sebring test, which saw a 1.5mm reduction in air restrictor for the Cadillacs.

The GT Le Mans class, meanwhile, sees fuel capacity increases for both the BMW M6 GTLM (+4 liters) and Porsche 911 RSR (+3 liters), while GT Daytona sees a number of weight and power adjustments.

The Acura NSX GT3 has been given a 20kg weight increase but slight increase in turbo boost in the low-to-mid ranges, with the Audi R8 LMS gaining 5kgs in minimum weight as well.

The Mercedes-AMG GT3 has also received a 20kg weight increase but 1.5mm increase in air restrictor, to offset the weight adjustment.

Changes have also been made in the fuel capacities for the Mercedes and Porsche 911 GT3 R (+2 liters), Lexus RC F GT3 (-1 liter) and Acura (+1 liter).