Originally Posted by IS2000
I'm just wondering if it's normal for the N54 to be making high-pitch sound at 4K rpm and above? The sound is pretty noticeable inside the cabin.
this shouldnt happen unless u have AA Xede or Procede. I have the Xede and u can hear a pshhhht in the high rpms due to more boost and also i can hear the turbos spool up harder and louder. Mike.