I heard this same sound after getting my APR intake. I was worried about it too. Thought it was the "dentist drill" turbo sound that comes before a turbo failure.Hi guys!
I'm hearing a whistle noise after installing the APR intake. It only happens when I'm at low RPMs and give a mid throttle. As boost is building up the whistle come.
On light throttle or WOT, nothing.
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