Hey I have a 2018 bmw m3 I been having an issue with my car for a couple months with a high pitched sound that sounds like it’s coming from the driver side when I’m under boost. As soon as I go above 3-4k rpm it makes this supercharger whine. I’ve smoke tested the car and haven’t been able to find the leak and took it to shops. I’m really annoyed with this problem and I’m trynna get it resolved. The mods I have done are mishi moto chargepipes, ftp turbo inlet, and a aftermarket jpipe.
https://youtube.com/shorts/LaNQv-uKV...JtWqx8o9dj5kPx