Sounds better than the stock Kunos sound for sure. Someone mentioned to make the sound "deeper" and I may be able to help with that. "Amplified NL" has made some of the most realistic sounding car mods and I actually have a BMW M3 E92 GUID and .bank by Amplified NL before they deleted almost all of their sound and made it private. You can listen to the exterior hood sound here:
https://soundcloud.com/amplifiednl/bmw-m3-e92-sound , but of course he took the download down (probably planning to sell them). I managed to download the .bank and GUID a couple years ago and the cabin noise is extremely realistic sounding and has a very deep thrumming. Again it's the most realistic car sound I've heard in any racing simulator.
How has anyone after 6 years not come that close to Amplified NL yet?
It's so depressing how they took the download links down...