I'm wondering if there are any at all. The sounds currently in the game are pretty good especially the V12 sounds, very realistic too so nothing too 'movie style'. They sound like an actual engine sounds.

But let's admit it. A brutal screaming engine sounds much much more fun. Compare what a Veyron sounds like compared to a Ferrari FXX. Compare the sound of a V8 in game compared to a Mustang. Realistic sure but not really fun. Also turbos sound so so weak. I'm not sure they scale in sound like engines do?

So if you've got a favourite let me know because I can't seem to find them. I might not be looking in the right places though.