Well, PMR and Magnus switched from Audi to Lamborghini, and it seems that Audi have gotten the short end of the stick in IMSA as far as BOP vs the Lambo, especially top speed.
That and in NA right now it seems that Audi Sport are more focused on TCR and GT4 than GTD, which is the only major place that the R8 GT3 races in NA vs various SRO-supported or GT3-based series in Europe and Asia/Oceana. Also as mentioned, Audi do own Lamborghini
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