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hey im just wondering if anybody knows if a kkr 480 is ment to make a whining noise just before boost?

I have recently installed a kkr480 and while driving there is a whining noise and build up then as soon as it hits 1PSI it goes away, is this the turbo or could there possibly be a leak somewhere? because i have checked all my lines for intercooler and vacuum lines doesnt seem to be any problems.

Cheers guys

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