What’s that sound?

Jul 13, 2021
1
1
Yo, first thread,
Just put a new intake into the Ibiza, gave it some revs from a warmed up engine, and the result is mint! However, there is a slight trimming sound towards the end of the Rev cycle each time, sounds like something failing to spin/slowing down very quickly? Hope it’s not the turbo? Anyways thanks in advance 👍
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