This is completely different. This is steering issues. After muffler delete is when I had this whistling. Before I shifted at high rpms and no sound. If I put the muffler back on, then the sound will vanish.I dont know if this help but i had the same problem. I didnt take anything of my car though. http://forum.e46fanatics.com/showthread.php?t=841705&highlight=
very noticable:I'm glad its a cheap fix. :thumbsup:
The hole will be noticeable?