Thread: N55 FBO turbo whine
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      01-13-2014, 04:10 PM   #5
iuhutch
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Drives: 18%E2%80%99 F80 ZCP
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No, engine cowl removed running bmw cabin filters. Only whines under load and above 4k. Interesting thought on inter cooler piping, in intake side was a bitch but all clamps are on extremely tight
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