i recently brought the silhouette the touring cup and the a d a c 2015 series oh boy what a mistake all the silhouette touring cup also the Nissan g t r cars have got the same problem synthesised and distorted sound
they are some of the older cars, so its unlikely theyll be changed but things have gotten better with the audio engine and recordings themselves. the silhouettes arent too bad though
They are older but that doesn't mean there's an in-game problem with how they sound. I tried a few of these cars and didn't hear anything obviously wrong.